Then and Now: The Big Bang Theory Cast

The Big Bang Theory cast has come a long way since the show first premiered. Fans fell in love with the quirky group of friends, including Sheldon Cooper, played by Jim Parsons, and Penny, played by Kaley Cuoco.

Over the years, the cast has grown and evolved, both on and off screen. From Jim Parsons' iconic portrayal of Sheldon to Kaley Cuoco's lovable character Penny, the cast has become a household name.

With their brainy characters and hilarious antics, The Big Bang Theory cast has won the hearts of millions. Take a look at what the cast is up to now and how they've changed over the years.