The Big Bang Theory will end after a 12th and final season.

Entertainment Weekly exclusively reported that CBS and Warner Bros. TV made the decision because star Jim Parsons was ready to move on from the hit sitcom.

When the show ends its incredibly successful run in May 2019, it will go down as the longest-running multi-camera series in television history.

End of an era: EW has reported The Big Bang Theory is ending because Jim Parsons was ready to leave the show

What a run! The Big Bang Theory will end in 2019 after season 12; the show stars Kunal Nayyar, Simon Helberg, Melissa Rauch, Jim Parsons, Mayim Bialik, Johnny Galecki and Kaley Cuoco

'We are forever grateful to our fans for their support of The Big Bang Theory during the past twelve seasons,' Warner Bros. Television, CBS and Chuck Lorre Productions said in a joint statement.

'We, along with the cast, writers and crew, are extremely appreciative of the show’s success and aim to deliver a final season, and series finale, that will bring The Big Bang Theory to an epic creative close.'

Star Johnny Galecki told Us Weekly in March about a potential show finale. 'We spent thousands of days, literally, in the same room together as a unit, as a family. So to not wake up and not have that to go to is going to be very jarring, I’m sure.'

Galecki added, 'I hope they write something emotional, because I know we’re all gonna be crying anyway. So you might as well make it appropriate! Capture that on camera, write that to be conducive to the fact that we’re all gonna be blubbering messes that night.'

Co-star Kunal Nayyar also weighed in on the show's finale. 'I think it would be great for all the guys and the girls just to be in the living room eating Chinese food. Wouldn’t that be a loving last scene? Just talking nonsense in the end.'

Going out with a bang: The show ranked number one during season 11

The decision to end the show comes less than three weeks after CBS Entertainment president Kelly Kahl said the network and WBTV tried to have it extended beyond season 12.

'We don't believe it's the final year,' Kahl revealed at the Television Critics Association’s summer press tour. 'We are in preliminary discussions to renew the show with Warner Bros.'

However, a season 13 of The Big Bang Theory would not have come cheap.

The five original stars --Parsons, Galecki, Nayyar, Kaley Cuoco, and Simon Helberg -- started earning $1million per episode when the show hit its peak in 2014. But, according to People, they would all reportedly take a voluntary $100,000 pay cut so that the two stars who joined the cast later, Mayim Bialik and Melissa Rauch, could be paid the same.

Making its mark: The show will go down as the longest-running multi-camera series in television history; when it closes it will end with 279 episodes

The series, which was created by Chuck Lorre and Bill Prady, debuted on CBS in September of 2007. Since then it has received 52 Emmy nominations, that includes 10 wins, and seven Golden Globe nominations.

Overall, the series has won 56 awards from 216 nominations to date.

The show has ranked within the top ten of the final television season ratings in seven seasons; ultimately reaching the number one spot in its 11th season.

When the Emmy-nominated comedy series comes to a close next year, it will end with a record-breaking 279 episodes.

The final season of The Big Bang Theory will debut Monday, September 24 (8/7c) on CBS before moving to its regular time period on Thursday, September 27 (8/7c).

The show's spinoff -- Young Sheldon -- is already a hit and will return for a second season in September.