The Big Bang Theory (often shortened to Big Bang Theory, and abbreviated to TBBT or BBT) is an American television sitcom created by Chuck Lorre and Bill Prady, both of whom serve as executive producers on the series, along with Steven Molaro. All three also serve as head writers. The show premiered on CBS on September 24, 2007. In March 2014, the show was renewed for three more years through a tenth season, which premiered on September 19, 2016.