Conor McGregor actually did it.

Four years after setting his sights on becoming the first two-weight UFC world champion, McGregor knocked out Eddie Alvarez with masterful second-round combination to capture the UFC lightweight title and make history in the main event of UFC 205. McGregor now controls the destinies of two UFC divisions, and that will undoubtedly be a fascinating story to watch moving forward.

Check out reaction to McGregor's flawless victory below, plus the best of the rest from a historic night inside New York's Madison Square Garden.

YES!!!!! — Artem Lobov (@RusHammerMMA) November 13, 2016

Fuck me — Neil 2 Tap Seery (@NeilSeeryMMA) November 13, 2016

HOLY SHIT X 2!!!!! Two way world champ!!! @ufc — Brian Ortega (@BrianTcity) November 13, 2016

omg that was sick by @TheNotoriousMMA — Rory MacDonald (@rory_macdonald) November 13, 2016

Wow Conor made that look way too easy. Sky is the limit for him — Matt Brown (@IamTheImmortal) November 13, 2016

Wow all hail the king! @TheNotoriousMMA ... Fucking incredible — Ian McCall (@Unclecreepymma) November 13, 2016

Wow. What. The. Fuck. That's fucking infuriating. — Kevin Lee (@MoTownPhenom) November 13, 2016

Mad respect to Conor . Dude shows up & smashes! WOW #UFC205 — Derek Brunson (@DerekBrunson) November 13, 2016

Easy work for Connor. Like I've said a million times Eddy Alvarez is way overrated and blessed to be where he is just McGregor said also — James Vick (@JamesVickMMA) November 13, 2016

Well that was impressive. #UFC205 — Scott Holtzman (@HotSauceHoltzy) November 13, 2016

He said he would do it and it was done! Super proud of @TheNotoriousMMA two weight world champ! Splendid! #SBG #UFC #historymaker #D12 — Aisling Daly (@aisydaly) November 13, 2016

Well done @TheNotoriousMMA. Now bring on @TeamKhabib for him, thats a fight I want to see — Alexander Gustafsson (@AlexTheMauler) November 13, 2016

Well done McGregor! Amazing performance. #UFC205 — Anthony Perosh (@AnthonyPerosh) November 13, 2016

Congrats @TheNotoriousMMA ! First time in history ! Get this man his second belt ! — Platinum Mike Perry (@PlatinumPerry) November 13, 2016

Hate him or love him..... you can't take it from him. My hat is off to @TheNotoriousMMA — Brandon Thatch (@RUKUSMMA303) November 13, 2016

Haha the Irish guy looked great. Impressive

YES he get that timing thing — Junior Dos Santos (@junior_cigano) November 13, 2016

. @TheNotoriousMMA is the GOAT. We all just need to accept it. All due respect Anderson and Fedor and Jon Jones. It's just unreal. #UFC205 — Sean O'Connell (@realOCsports) November 13, 2016

Precision and countering of McGregor is pretty incredible..congrats to @TheNotoriousMMA on making history..beat a great guy in Alvarez — Zachary Makovsky (@ZachFunSize) November 13, 2016

I'd like to take the time to apologize to absolutely Effin nobody I can't stop laughing #ufc205 #hesafool — Tatiana Suarez (@TSPMMA115) November 13, 2016

I ain't no hater homie that interview was classic!!! Well deserved congrats on making history @TheNotoriousMMA @ufc — Brian Ortega (@BrianTcity) November 13, 2016

Pretty much how I vision that fight going down! — Demetrious Johnson (@MightyMouseUFC) November 13, 2016

Best post fight speech in history ID LIKE TO APOLOGIZE TO ABSOLUTELY FUCKINGG NOBODY — Alex Nicholson (@spartanlife32) November 13, 2016

Can't believe I'm saying this. But I'd be interested in seeing a Conor McGregor vs Floyd Mayweather boxing match #UFC205 — Derek Brunson (@DerekBrunson) November 13, 2016

TYRON WOODLEY VS. STEPHEN THOMPSON ENDS IN MAJORITY DRAW

Buffer don't make mistakes I don't believe that hahah! Not seen one yet. I blame someone else. Draw is fair! #UFC205 — scott askham (@scottaskham1) November 13, 2016

Where is Steve Harvey at lol #ufc205 — John Dodson III (@JohnDodsonMMA) November 13, 2016

Wait what the hell is going on!!!!! Dam got me running around. DRAW!!!! @ufc — Brian Ortega (@BrianTcity) November 13, 2016

Don't boo that man. That was an amazing fight!!! #ufc205 — The Spartan (@EliasTheodorou) November 13, 2016

That was intense hahahaha #UFC205 — Jerome-Max Holloway (@BlessedMMA) November 13, 2016

Woodley & Wonderboy you are beasts! #UFC205 — Derek Brunson (@DerekBrunson) November 13, 2016

That fight was so good it confused the shit out of everyone. #UFC205 #AndStill — Coach (@CMPunk) November 13, 2016

Everybody give Bruce a break. He is like Ron Burgundy. Just reads whatever they put on the teleprompter. #UFC205 #goFyourselfSanDiego — Sean O'Connell (@realOCsports) November 13, 2016

That was a draw in my books great fight @WonderboyMMA and @TWooodley — Mitch Gagnon (@MitchGagnonUFC) November 13, 2016

For such a close fight I agree with the decision...hard to have a decisive winner. #UFCNYC #ufc205 #mma — Chris Kelades (@keladesmma) November 13, 2016

I can see that result. Hate it, but I can see it. #ufc205 — Scott Holtzman (@HotSauceHoltzy) November 13, 2016

Woodley didn't want to give wonderboy A chance initially... Now he has to fight him twice #ufc205 — Siyar Bahadurzada (@Siyarized) November 13, 2016

JOANNA JEDRZEJCZYK DEF. KAROLINA KOWALKIEWICZ

Got mad respect for JJ & KK #UFC205 — Cub Swanson (@CubSwanson) November 13, 2016

Man those Polish chicks can fight! #ufc205 — Joe Ellenberger (@JoeEllenberger) November 13, 2016

Damn... Joana's face looks like a character from the Star Trek. Tough fight. #ufc205 — Siyar Bahadurzada (@Siyarized) November 13, 2016

Joanna with the win. #ufc205 — Tatiana Suarez (@TSPMMA115) November 13, 2016

Great fight!! These girls can scrap!! — Artem Lobov (@RusHammerMMA) November 13, 2016

Joanna is such a badass!! — James Vick (@JamesVickMMA) November 13, 2016

It goes to decision. I knew Joanna would win but I was not expecting such a fight and heart from Karolina — Brian Ortega (@BrianTcity) November 13, 2016

Good fight ! Got better as the fight went on. If KK opened up more earlier would have been interesting! JJ looked like she was walking it — scott askham (@scottaskham1) November 13, 2016

That was a great fight #ufc205 — JIMI MANUWA (@POSTERBOYJM) November 13, 2016

These Ladies are TOUGH — Jake Ellenberger (@EllenbergerMMA) November 13, 2016

@joannamma killed her in a beautiful 5 rounds ! Let's train and I'll show you some power tricks and you can show me combo speed tricks — Platinum Mike Perry (@PlatinumPerry) November 13, 2016

YOEL ROMERO DEF. CHRIS WEIDMAN

Man, that was tough to watch @ChrisWeidmanUFC is an awesome guy. I hope he is ok from that's one. #UFCNYC #UFCNYC — Seth Baczynski (@Sethbmma) November 13, 2016

Holy shit ... that's a scary man — Ian McCall (@Unclecreepymma) November 13, 2016

I love you. See you soon boy #ufc205 — Tatiana Suarez (@TSPMMA115) November 13, 2016

The sound of that was crazy! #UFC205 — Jerome-Max Holloway (@BlessedMMA) November 13, 2016

Actions speak louder than words — Cub Swanson (@CubSwanson) November 13, 2016

Holy F*** that was the move of the century. But gosh. Get Weidman to the hospital right away. Ouch #ufc205 — Felice Herrig (@feliceherrig) November 13, 2016

OMGGGGGGGGG — Jake Ellenberger (@EllenbergerMMA) November 13, 2016

Micheal bisping is a dead man walking. @YoelRomeroMMA #ufc205 — Chase Sherman (@ChaseShermanUFC) November 13, 2016

That was a nasty knee — Randa Markos (@randamma) November 13, 2016

There is no athlete better in the entire @Ufc than @YoelRomeroMMA — Daniel Cormier (@dc_mma) November 13, 2016

Man, hope Weidman is ok. #ufc205 — Scott Holtzman (@HotSauceHoltzy) November 13, 2016

RAQUEL PENNINGTON DEF. MIESHA TATE

Pennington kind of looks like a vampire... and just took Tate's soul. #ufc205 — The Spartan (@EliasTheodorou) November 13, 2016

Wow Tate was flat tonight! #UFC205 — Derek Brunson (@DerekBrunson) November 13, 2016

Congrats to Colorado's @RockyPMMA on what should be a Unanimous Decision Win! #UFC205 — Chris Camozzi (@ChrisCamozzi) November 13, 2016

No matter how good some fighters get technically at striking they're never gonna be good at it if they continue to be afraid to get hit. — James Vick (@JamesVickMMA) November 13, 2016

Think that's the last we'll see of Tate not the same fighter anymore — Neil 2 Tap Seery (@NeilSeeryMMA) November 13, 2016

Good job Pennington. Smart fight — Tatiana Suarez (@TSPMMA115) November 13, 2016

I did not see that coming — Leslie Smith (@LeslieSmith_GF) November 13, 2016

Tate just called it a day. Wow. Last two fights she hasn't looked the same... #ufc205 — The Spartan (@EliasTheodorou) November 13, 2016

Fuck I was right — Neil 2 Tap Seery (@NeilSeeryMMA) November 13, 2016

Miesha Tate was one of the first women to fight! Respect on her retirement! #UFC205 — Derek Brunson (@DerekBrunson) November 13, 2016

Wo Tate retires!! What a career!! Fan favorite and will truly be missed. Hope we see her back! #UFC205 — scott askham (@scottaskham1) November 13, 2016

@MieshaTate congrats on a great career. Bummed to see you retire but I hope you do what makes you happy next #ufc205 — Chris Camozzi (@ChrisCamozzi) November 13, 2016

Retirement!!!???? If this is true thanks you for everything that you have done for the sport and influence in women's MMA — Brian Ortega (@BrianTcity) November 13, 2016

.@MieshaTate great career thank you for your scraps! #Respect — Cody Garbrandt (@Cody_Nolove) November 13, 2016

Wow, was joking around about the fight but truly will miss seeing @MieshaTate inside the octagon! #respect @ufc — Alan Jouban (@AlanJouban) November 13, 2016

. @mieshatate and I have had some beef in the past but i respect what she has done for the sport & understand how hard it must be to leave. — Felice Herrig (@feliceherrig) November 13, 2016

Congrats to @CupcakeTate on an amazing career-I'm only sad I never got to share the octagon w/u. @ufc #Ufc205 #CupcakeTate — Ashlee Evans-Smith (@AshleeMMA) November 13, 2016

FRANKIE EDGAR DEF. JEREMY STEPHENS

Much respect to Frankie. So much heart. #UFC205 — Tatiana Suarez (@TSPMMA115) November 13, 2016

Wow! Edgar v Stephens is everything it looked like on paper!! #UFC205 — Joe Ellenberger (@JoeEllenberger) November 13, 2016

Wow! Edgar v Stephens is everything it looked like on paper!! #UFC205 — Joe Ellenberger (@JoeEllenberger) November 13, 2016

Frankie truly is the "Rocky Balboa" of the UFC. There are pros and cons to that tittle. #UFC205 — The Spartan (@EliasTheodorou) November 13, 2016

Edgar/ Stephens has been a war. This the fight I was most excited for on the card. — Andre Fili (@TouchyFili) November 13, 2016

That's what I'm talking about!! These are the kind of fights I love!! Good dam fight between Edgar and Stephens. @ufc — Brian Ortega (@BrianTcity) November 13, 2016

That's was an amazing fight. Well done to both @FrankieEdgar and @LiLHeathenMMA — michael (@bisping) November 13, 2016

Amazing fight — Amanda Nunes (@Amanda_Leoa) November 13, 2016

God damn Jeremy hits hard. We're proud of you man! #UFC205 — Angela Hill (@AngieOverkill) November 13, 2016

KHABIB NURMAGOMEDOV DEF. MICHAEL JOHNSON

That cross wrist with the ground and pound is done beautifully ! #UFC205 — scott askham (@scottaskham1) November 13, 2016

The champ... Khabib .... — Thiago Tavares UFC (@TavaresMMA) November 13, 2016

Great ground and pound, the pressure @TeamKhabib has was just to much for Johnson. — Mitch Gagnon (@MitchGagnonUFC) November 13, 2016

Wow I'm not sure @TheNotoriousMMA lasts a round against @TeamKhabib !!! That was freakin amazing — Ben Askren (@Benaskren) November 13, 2016

@TeamKhabib what a performance — Alexander Gustafsson (@AlexTheMauler) November 13, 2016

What a beautiful Kimura from Khabib but Johnson I give you credit homie for the heart you showed tonight. @UFC — Brian Ortega (@BrianTcity) November 13, 2016

No disrespect to #TonyFerguson but I think @TeamKhabib deserves the next title shot. #ufc205 — Dennis Bermudez (@MenaceBermudez) November 13, 2016

Fuck that was hard to watch #ufc205 — Neil 2 Tap Seery (@NeilSeeryMMA) November 13, 2016

#khabib for the next title shot? I think so! Impressive performance for sure. MJ was having his way early, but those TDs tho. #UFC205 — Aljamain Sterling (@FunkMaster_UFC) November 13, 2016

Khabib grew up wrestling bears this UFC shit is easy — Tom Breese (@BreeseMMA) November 13, 2016

Give Khabib a title shot already — Felice Herrig (@feliceherrig) November 13, 2016

Number one humble kill the chicken — Al Iaquinta (@ALIAQUINTA) November 13, 2016

I want fight with your chicken #teamkhabib — Tatiana Suarez (@TSPMMA115) November 13, 2016

Man honestly @TeamKhabib smashes all the dudes in this division. — Daniel Cormier (@dc_mma) November 13, 2016