Big Bang Theory four years, Anniversary news of the 'Big Bang Theory' four year run at the PaleyFest have TV buffs talking today. The cast members are happily celebrating their "Big Bang Theory" love, and success, according to Thursday, March 14 reports on The Huffington Post. Hash tags such as, “#bigbangtheoryfouryears have Twitter users searching, and chatting up about all the news about their favorite television comedy. The "Big Bang Theory's" four year anniversary celebration marks over 20 million fans and viewers for recent and reruns of the funny TV show that has taken the viewers by storm. "Big Bang Theory" star, Simon Helberg, stated on Wednesday evening during the PaleyFest,"We're shoving it down people's throats, and then they're learning that they actually love that." “The Big Bang Theory” four years running news reports reveal that the show, which first debuted on CBS on September 24, 2007, and is written and