What Happened To Johnny Galecki After The Big Bang Theory?

When you play the same character on TV for 12 seasons, it's understandable if you need a bit of a break when the show ends. When Johnny Galecki first played Dr. Leonard Hofstadter on CBS sitcom The Big Bang Theory back in 2007, he probably wasn't expecting to be part of one of the most successful comedies of all time, but he now has millions of fans and millions of dollars to show for it.