Johnny Galecki has been tapped as one of the two leads in CBS' comedy pilot The Big Bang Theory, according to The Hollywood Reporter.

In other pilot-casting news, Smith Cho has been added to CW's comedy She Said/He Said, Danielle Savre has joined CBS' comedy You've Reached the Elliotts, Deren Leroy has been upped to regular in ABC's comedy Him and Us and Edward Kerr has joined ABC's comedy Girls on the Bus.