The Big Bang Theory made TV history on Wednesday as production began on its 276th episode, making it the longest-running multi-camera sitcom ever, breaking Cheers' record of 275, according to studio Warner Bros. The cast, producers, and crew celebrated on the set after the table read with cupcakes to honor the milestone. Episode 276 will air in May as one of the final episodes of the series.

The longest-running live-action sitcom of any kind is The Adventures of Ozzie and Harriet, which ran for 435 episodes from 1952 to 1966. And The Simpsons tops them all by a lot, with 657 episodes in the can since 1989.

Warner Bros. released a photo of the celebration, featuring Simon Helberg's big hat.

Steve Holland, Chuck Lorre, Steven Molaro, Johnny Galecki, Kaley Cuoco, Kunal Nayyar, Mayim Bialik, Melissa Rauch, Jim Parsons, Simon Helberg, and Bill PradySteve Holland, Chuck Lorre, Steven Molaro, Johnny Galecki, Kaley Cuoco, Kunal Nayyar, Mayim Bialik, Melissa Rauch, Jim Parsons, Simon Helberg, and Bill Prady

The Big Bang Theory's one-hour series finale will air Thursday, May 16 at 8/7c on CBS. New episodes air Thursdays on CBS at 8/7c. The series is available to stream on CBS All Access.

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