Holly Holm is the new UFC bantamweight champion.

In an unbelievable and immensely iconic performance, Holm knocked out Ronda Rousey with a dazzling second-round head kick in front of a record-breaking crowd in Melbourne, Australia at UFC 193, turning the world of mixed martial arts on its head with a sequence that will forever be remembered as one of the most legendary in the sport's young history.

Check out a running timeline of the madness below, as the pros react to Holm's dethroning of the former UFC queen.

Uhhhh somebody's 0 is got to go — Demetrious Johnson (@MightyMouseUFC) November 15, 2015

Must be nice having more than one sponsorship to represent! — Jeremy Stephens (@LiLHeathenMMA) November 15, 2015

Holly is going to knock her out. — Joe Lauzon (@JoeLauzon) November 15, 2015

What a crazy pace to start this main event #ufc193 — Colby Covington (@ColbyCovMMA) November 15, 2015

Holy shit!!!! Both ladies lighting each other up!!!! — Raquel Pennington (@RockyPMMA) November 15, 2015

Toooooo crunk 10-9 Holm #UFC193 — Derek Brunson (@DerekBrunson) November 15, 2015

HOLY SHIT HOLY SHIT HOLLY — Josh Samman (@JoshSamman) November 15, 2015

I think holly holm won that round.... Wow — Brad Tavares (@BradTavares) November 15, 2015

That's as about as exciting of a round I've ever seen in the @ufc women's division — Justin Edwards (@FastEddyMma) November 15, 2015

OMG I’m so excited. Holly doing amazing work. Landing the straight cross, taking Ronda down. 1-0 holly -#ufc193 — Sarah Kaufman (@mmasarah) November 15, 2015

THROW THE HIGH KICK AFTER THE STRAIGHT LEFTTTTTT #UFC193 — Josh Samman (@JoshSamman) November 15, 2015

Well… I said it. Awesome fight by Holly Holm. — Joe Lauzon (@JoeLauzon) November 15, 2015

Wooooow! This fight had my blood pumping and on the edge of my seat! Insane @ufc ending with HOLM as winner!!! #UFC193 — Johnny Hollywood (@HollywoodCase) November 15, 2015

Ohhhhh shittt!!!! Congrats @_HOLLYHOLM you fought an amazing fight!!!!!!!!! — Brad Tavares (@BradTavares) November 15, 2015

Omg!! That's the biggest upset in ufc history!! — James Vick (@JamesVickMMA) November 15, 2015

Wow!! @_HOLLYHOLM is the real fucking deal!!! — Cody Garbrandt (@Cody_Nolove) November 15, 2015

I hope she's ok — Robert Whiteford (@Flyinjudoka) November 15, 2015

Wait .... Aaaaahahahahahahahahahahahahahahahahahahahaha!!!!!!!! — Ian McCall (@Unclecreepymma) November 15, 2015

Wow!!!!!!!! Now other words — Scott jorgensen (@Scottjorgensen) November 15, 2015

I won some money!!! Holm made Rousey look like an amateur — Jeremy Stephens (@LiLHeathenMMA) November 15, 2015

HOOOOLY SHIT! #AndNew! Ronda is down! — Jan Blachowicz (@JanBlachowicz) November 15, 2015

Not surprised. Jus sayin. Listen to my podcast. I called it weeks ago. — Matt Brown (@IamTheImmortal) November 15, 2015

Holly Holm paying homage to Rousey after a ridiculous KO! Much respect to her for that. She looked phenomenal tonight! #UFC193 — Aljamain Sterling (@FunkMaster_UFC) November 15, 2015

Amazing — TJ Grant (@TJ_Grant) November 15, 2015

Oh my fucking God, if you could've hear this fucking bar right now #UFC193 — Angela Hill (@AngieOverkill) November 15, 2015

U must have RESPECT in this sport. I said it from weigh ins Holm Champ Congrats #TeamElCucuy #StayHumbleFightHard pic.twitter.com/7YkoMIflMD — Tony Ferguson (@TonyFergusonXT) November 15, 2015

WOW what a nasty kick. Perfect fight for holly. Ronda was done from the start! Unbelievable just came true. Congrats @_HOLLYHOLM — Michael Johnson (@FollowTheMenace) November 15, 2015

Ronda did everything Holly planned for, instead of making Holly play to her strengths. Still in shock though. #UFC193 — The Spartan (@EliasTheodorou) November 15, 2015

I've never wanted to come read Twitter more in my life — Tom Lawlor (@FilthyTomLawlor) November 15, 2015

ARE YOU KIDDING MEEEEE!!!!! #ufc93 — Stephen Thompson (@WonderboyMMA) November 15, 2015

I said holly’s kicks would finish the fight if she could get the distance and I’m so fricking pumped!!! #ufc193 — Sarah Kaufman (@mmasarah) November 15, 2015

Holy shit that was nasty — Demetrious Johnson (@MightyMouseUFC) November 15, 2015

Hoooooooley shit! — Ryan Bader (@ryanbader) November 15, 2015

I blame @travisbrowneMMA — Big Ben Rothwell (@RothwellFighter) November 15, 2015

Yess sirrr thank you holly holm #lol https://t.co/vOm6HIcvsZ — Lorenz Larkin (@da_MONSOON) November 15, 2015

Head up champion @RondaRousey. — Cole Miller (@colemillerATT) November 15, 2015

Hooooo my god !!!! #UFC193 — patrick cote (@patrick_cote) November 15, 2015

Kick to the neck is the worst! #UFC193 — Jerome-Max Holloway (@BlessedMMA) November 15, 2015

Congrats @JacksonWinkMMA ! Congrats @IzzyStyle all you guys did an amazing job. you all believed. There is nothing more important! Congrats — Daniel Cormier (@dc_mma) November 15, 2015

Holly Holm y'all, wow that was amazing! — Derek Brunson (@DerekBrunson) November 15, 2015

Wow I'm just very sad but what can u do #fightgame is tough congrats Holly Holmes @ufc #damn :( — Manny Gamburyan (@MannyGamburyan) November 15, 2015

The best part of my night is that my wife was looking at me like I had 3 heads when I told her this AM it would end like this. #UFC193 — Joe Lauzon (@JoeLauzon) November 15, 2015

I CAN'T EVEN SPELL "WELCOME" WOHHHHHH pic.twitter.com/LzZQDvAPuS — Josh Samman (@JoshSamman) November 15, 2015

Holy shit what a perfectly executed Plan !!!! Holly Holme — Edward Alvarez (@Ealvarezfight) November 15, 2015

OMG THAT WAS GANGSTA SHIT. SHE KEPT IT GANGSTA FROM WEIGH IN TIL THE FIGHT. MUCH RESPECT BOTH LADIES! CONGRATS TO @_HOLLYHOLM #GANGSTASHIT — Anthony Johnson (@Anthony_Rumble) November 15, 2015

Congrats to @_HOLLYHOLM A great pioneer of the fight sport I'm sure @RondaRousey will be back. #UFC193 — Raphael Assuncao (@RaphaAssuncao) November 15, 2015

Because you can @_HOLLYHOLM — Jon Bones Jones (@JonnyBones) November 15, 2015

That was like Ernesto hoost style head kick!!! — Demetrious Johnson (@MightyMouseUFC) November 15, 2015

OH MY GOD!!!! — Randa Markos (@randamma) November 15, 2015

Should not be underestimated boxers terrific job on my feet, @_HOLLYHOLM was gorgeous #UFC193 — Albert Tumenov (@ATumenov) November 15, 2015

"THERE IS NO SUCH THING AS AN UNDERDOG! Once the bell rings it 50/50... We ALL have our chances" -yours truly ;-) #UFC193 — David Loiseau (@DavidLoiseau) November 15, 2015

All respect to @_HOLLYHOLM she did great a job. That what means "believe in yourself". Congrats to a new champion. — Ruslan Magomedov (@MagomedovUFC) November 15, 2015

1 of the most dominate @ufc fighters to KO'd stiff as a board. This sport is insane & as real as it gets! #ufc193 #AnythingCanHappenToAnyone — Johnny Hollywood (@HollywoodCase) November 15, 2015

The world just got turned upside down! — Ben 10 Nguyen (@Ben10MMA) November 15, 2015

...and Joe Rogan shed many a tear #UFC193 — Angela Hill (@AngieOverkill) November 15, 2015

Open the floodgates of excuses — Scott Holtzman (@HotSauceHoltzy) November 15, 2015

As my coach @dukeroufus would say south paw jinx. Left hands for days set that up. — Erik Jon Koch (@NEWBREED04) November 15, 2015

Who remembers when I said No IVs more violent KOs #UFC193 — Anthony Birchak (@abirchakMMA) November 15, 2015

Striking + Takedown D = W — Louis Smolka (@LASTSAMURAIUFC) November 15, 2015

Good things happen to good people and @_HOLLYHOLM has always been good people. So happy for her. GOOD NIGHT IRENE #ufc193 — MichaelSchiavello.·. (@SchiavelloVOICE) November 15, 2015

So happy for you @_HOLLYHOLM!! Congrats champ! — Michael McDonald (@MaydayMcDonald) November 15, 2015

In this business it's no games. You loose once they forget about you. Always make sure you have real friends to be there and love you NMW! — Brian Ortega (@BrianTcity) November 15, 2015

Holm might have retired Ronda. She didn't just beat her. She embarrassed her in every category. #beast #holm #ufc — Tony Martin (@tmartinmma) November 15, 2015

I can't remember such a one sided title fight like this where the Champ was so outclassed #UFC193 — John Alessio (@johnalessio79) November 15, 2015

@RondaRousey Its not how many times you get knocked down its how many times you get up and move forward. — Roy Nelson (@roynelsonmma) November 15, 2015

Did that really happen? — Eddie Bravo (@eddiebravo) November 15, 2015

You can be the most skilled fighter in the world, but if you make poor decisions, you'll get beat... @UFC #UFC193 — Zachary Makovsky (@ZachFunSize) November 15, 2015

That's the real possibility in the fight game. One min, you are on top of the world, next min people "fans" spit at you. Peaks & Valleys. — Joe Ellenberger (@JoeEllenberger) November 15, 2015

Sorry guys, gonna have to postpone my announcement due to being overseas. Congrats to the new champ @_HOLLYHOLM — Dan Henderson (@danhendo) November 15, 2015

Wonder if Ronda's mom is going off on Edmond right now? #Thoughts — Jeremy Stephens (@LiLHeathenMMA) November 15, 2015

Wow can't lie I'm in shock — Sergio Pettis (@sergiopettis) November 15, 2015

@RondaRousey will be back like a boss! She's a #boss for real. Tonight wasn't her night but she's still a icon! — Anthony Johnson (@Anthony_Rumble) November 15, 2015

Always hope for the underdogs of the world #UFC193 — Patrick Cummins (@OfficialDurkin) November 15, 2015

Congratulation Holy Holm amazing head kick! @_HOLLYHOLM Deus é justo! God is fair! pic.twitter.com/vOML62bASv — Cris Cyborg (@criscyborg) November 15, 2015

Honda - Tyson Holm - Douglas Peña - Holyfield — Julianna Peña (@VenezuelanVixen) November 15, 2015

I will not retire invicta, but also will not @rondarousey kkkkk — Bethe (@bethecorreia) November 15, 2015

@MieshaTate now you can have ur Ronda fight, I'll take Holly. — Amanda Nunes (@Amanda_Leoa) November 15, 2015

— Miesha Tate (@MieshaTate) November 15, 2015

If there is 1 thing I agree with Ronda ever said was the kind of Champion @_HOLLYHOLM makes, a damn good one! #Congrats #LetsSetItUp RT @ufc — Miesha Tate (@MieshaTate) November 15, 2015

JOANNA JEDRZEJCZYK DEF. VALERIE LETOURNEAU

Val shouldn't be too hard on herself. She gave the champ a real fight — Kevin Lee (@MoTownPhenom) November 15, 2015

Wow best fight of the night so far.... what a great fight @ValTroubleMMA so so so proud of you! #UFC193 — Jessica Jag Aguilar (@jagatt) November 15, 2015

Such a fan of @joannamma so fun to watch. — Erik Jon Koch (@NEWBREED04) November 15, 2015

Damn it... It's hard to see women beaten up, bruised and cry. Women are not made for this sport. They're too delicate of creatures. — Siyar Bahadurzada (@Siyarized) November 15, 2015

Great fight and heart by Valerie — Tony Martin (@tmartinmma) November 15, 2015

Great fight @ValTroubleMMA congrats, keep the head up — rafael natal (@rafaelsaponatal) November 15, 2015

We are proud of you. Heads up. You will come back stronger. I'll always have your back! #loveyou @ValTroubleMMA pic.twitter.com/R9zGsRIWNB — Amanda Nunes (@Amanda_Leoa) November 15, 2015

MARK HUNT DEF. ANTONIO SILVA

Fuck yeah OG Mark Hunt!! — James Vick (@JamesVickMMA) November 15, 2015

Super Samoan wins!!! Took his time to set up his range then BAM big right that hit silva’s ear and dropped him #ufc193 — Sarah Kaufman (@mmasarah) November 15, 2015

USADA era = more buffets and KO for Hunt! #UFC193 — Derek Brunson (@DerekBrunson) November 15, 2015

Wow! Bigfoot was a little gun shy and let Hunt growing his confidence..nice KO tho @ufc #ufc193 — Nordine Taleb (@NordineTaleb) November 15, 2015

KO via right handed lunchbox to the head. #UFC193 — Scott Holtzman (@HotSauceHoltzy) November 15, 2015

Hunt's post-fight ints are up there with the Diaz Bros. Love it. #UFC193 — The Spartan (@EliasTheodorou) November 15, 2015

Love watching Mark Hunt, even if I can only understand half of what he’s saying. #UFC193 — Joe Lauzon (@JoeLauzon) November 15, 2015

Congrats to @markhunt1974 & @bigfootsilva .. always love rematches because they are always different. Congrats On... https://t.co/RBD7kYoKqB — Roy Nelson (@roynelsonmma) November 15, 2015

ROBERT WHITTAKER DEF. URIAH HALL

Damn Robert Whittaker is a Dog!! What a great performance! — James Vick (@JamesVickMMA) November 15, 2015

What a grueling fight, any reasonable person would have been knocked out by the shots Whittaker took. Dudes tough as nails #UFC193 — Angela Hill (@AngieOverkill) November 15, 2015

Whittaker is a contender Came with the heat. Great approach to beat a guy like hall @ufc #UFC193 — TJ Grant (@TJ_Grant) November 15, 2015

Fight of the night so far — Amanda Nunes (@Amanda_Leoa) November 15, 2015

Hall needs time & space to work magic, which Gegard gave him. Whittaker pressured relentlessly the majority and stifled much of Hall's game. — The Spartan (@EliasTheodorou) November 15, 2015

Dammit Uriah fucked up all my parlays — Kevin Lee (@MoTownPhenom) November 15, 2015

Whittaker showing some good pressure and patience to take that win. Great future in the works! #UFC193 #UFCMelbourne #mma — Chris Kelades (@keladesmma) November 15, 2015

Give credit to Hall for fighting through the hurt eye. Looked bad, and many fighters would have just dropped and taken the loss. #UFC193 — The Spartan (@EliasTheodorou) November 15, 2015

Whittaker just waisted his 30secs on the Mike #seizethemoment #UFC193 — Robert Whiteford (@Flyinjudoka) November 15, 2015

JARED ROSHOLT DEF. STEFAN STRUVE

Run and hug... I hate that style of fighting! A win is a win though @StefanStruve you did your best boss and we are still proud of you! — Anthony Johnson (@Anthony_Rumble) November 15, 2015

You know the fight wasn’t good when @joerogan doesn’t interview the winner of a ppv card fight #ufc193 — Sarah Kaufman (@mmasarah) November 15, 2015

Winning a fight to the sound of boos must suck as much as losing. — Dan Hardy (@danhardymma) November 15, 2015

We'll never know that feeling, my friend https://t.co/muu4xloj5h — SweetMeat (@mattmitrione) November 15, 2015

Forrest's shirt was more exciting than that fight. #UFC193 — The Spartan (@EliasTheodorou) November 15, 2015

Struve doesn't seem to be using the full extent of his reach — Cub Swanson (@CubSwanson) November 15, 2015

That made my fight against Leben look like Lawler vs McDonald II #UFC193 — Derek Brunson (@DerekBrunson) November 15, 2015

If Struve is the palm tree, Rosholt is the koala #UFC193 #australia — Angela Hill (@AngieOverkill) November 15, 2015