Learn more about the full cast of The Big Bang Theory with news, photos, videos and more at TV Guide Who's the most popular The Big Bang Theory cast member? All 379 cast members ranked by daily Buzz Score. Laurie Metcalf leads with a Buzz Score of 21.8. Includes 1-year averages and peak career popularity. Updated daily. Meet the full cast and crew of The Big Bang Theory including actors, directors, producers, and more. Learn more about the characters of The Big Bang Theory. This section includes characters who have appeared in The Big Bang Theory and Young Sheldon series with recurring role. An empty grey cell indicates the character was not in the season. The Big Bang Theory (TV Series 2007–2019) - Cast and crew credits, including actors, actresses, directors, writers and more. It has been a while since we last saw the gang hanging out in Apartment 4A, and the cast has stayed busy across TV, film, and even theater. Some stepped into new leading roles, others moved behind the camera, and a few returned to familiar universes in different ways. CBS sitcom The Big Bang Theory enjoyed a record-breaking run before coming to an end in 2019. Here’s a guide to the show’s cast and characters. The following is a list of characters from the American situation comedy The Big Bang Theory created and executive produced by Chuck Lorre and Bill Prady, which premiered on CBS on September 24, 2007, and concluded on May 16, 2019. Across the 12 seasons of The Big Bang Theory, we have seen 6 main characters, multiple guests, and minor characters. Let's check them out. American television and movie actor Johnny Galecki is seen playing Leonard Hofstadter who is an experimental physicist with an IQ of 173.