Throwback!See Kaley Cuoco and the Rest of ‘The Big Bang Theory’ Cast Then and Now

Reality TV

Jan 23, 2017 4:23 pm·

By Julia Birkinbine

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Can you believe The Big Bang Theory has already been on TV for 10 seasons?! We can't!

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The hit show's cast — including Kaley Cuoco, Jim Parsons, Johnny Galecki, and more! — have changed quite a lot since the sitcom premiered in 2007.

Click through the gallery below to see the stars then and now!

1 of 8

Kaley Cuoco (Penny Hofstadter)

Kaley portrays Penny, the primary female character on the show. The actress has won a Satellite Award, a Critics' Choice Television Award and a People's Choice Award for the role!

2 of 8

Jim Parsons (Sheldon Cooper)

Jim has won four Primetime Emmy Awards and a Golden Globe for his portrayal of theoretical physicist Sheldon!

3 of 8

Johnny Galecki (Leonard Hofstadter)

Johnny has been playing experimental physicist Leonard since the show's start in 2007!

4 of 8

Simon Helberg (Howard Wolowitz)

Simon won a 2013 Critics' Choice Television Award for playing engineer Howard.

5 of 8

Kunal Nayyar (Rajesh Koothrappali)

Kunal was one of the world's highest paid TV actors of 2015 due to his role on Big Bang — so cool!

6 of 8

Melissa Rauch (Bernadette Rostenkowski-Wolowitz)

Melissa joined the show as a guest star for Season 3 in 2009 and became a cast regular in Season 4!

7 of 8

Mayim Bialik (Amy Farrah Fowler)

In addition to acting, Mayim also has a PhD in Neuroscience — just like her Big Bang character, Amy!

8 of 8

The End!

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