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13 then and now photos of The Big Bang Theory's cast

It's watched all over the word, but sadly The Big Bang Theory is coming to an end. Released in 2007, the last episode will shortly be aired after 12 years of entertaining loyal fans from all walks of life. 12 years where we followed the changing lives of Leonard, Sheldon and Penny... as well as the actors themselves.

Illustration : "13 then and now photos of The Big Bang Theory's cast"

Because yes, over 12 years and more than 250 episodes, these actors have all hit the big time. Some were already known, others were plucked from obscurity and they're all now Red Carpet A-listers. But they all began somewhere, whether as a child actor or budding teenage thespian. So in honor of our favorite geeks and their entourages, here's a selection of 13 then and now photos of the cast.

1. Jim Parsons before he was cast as Sheldon Cooper

Illustration de l'article : 13 then and now photos of The Big Bang Theory's cast

© therealjimparsons / instagram © The Big Bang Theory / CBS

2. Mayim Bialik was a student before being offered the role of Amy Farrah Fowler

Illustration de l'article : 13 then and now photos of The Big Bang Theory's cast

© missmayim / instagram © The Big Bang Theory / CBS

3. Johnny Galecki without glasses and with a lot more hair than Leonard Hofstadter

Illustration de l'article : 13 then and now photos of The Big Bang Theory's cast

© sanctionedjohnnygalecki / instagram © The Big Bang Theory / CBS

4. Kaley Cuoco before and after her transformation into Penny Hofstadter

Illustration de l'article : 13 then and now photos of The Big Bang Theory's cast

© Picture Perfect / 20th Century Fox © The Big Bang Theory / CBS

5. A teenage Simon Helberg vs an adult Howard Wolowitz

Illustration de l'article : 13 then and now photos of The Big Bang Theory's cast

© Simon Helberg / facebook © Paul Marks/Broadimage/EAST NEWS

6. Melissa Ivy Rauch went from redhead to blonde to play Bernadette Rostenkowski-Wolowitz

Illustration de l'article : 13 then and now photos of The Big Bang Theory's cast

© themelissarauch / instagram © The Big Bang Theory / CBS

7. Kunal Nayyar as a baby, years before joining the cast as Rajesh Koothrappali

Illustration de l'article : 13 then and now photos of The Big Bang Theory's cast

© kunalkarmanayyar / instagram © The Big Bang Theory / CBS

8. Kevin Sussman is as recognizable as a young man as he is in the role of Stuart Bloom

Illustration de l'article : 13 then and now photos of The Big Bang Theory's cast

© kevsussman / instagram © The Big Bang Theory / CBS

9. A young John Ross Bowie looks so different as Barry Kripke

Illustration de l'article : 13 then and now photos of The Big Bang Theory's cast

© johnrossbowie / instagram © The Big Bang Theory / CBS

10. Sara Gilbert was already famous, but later snapped up the role of Leslie Winkle

Illustration de l'article : 13 then and now photos of The Big Bang Theory's cast

© thesaragilbert / instagram © The Big Bang Theory / CBS

11. Sara Rue, who plays Stephanie Barnett, clearly likes her bangs

Illustration de l'article : 13 then and now photos of The Big Bang Theory's cast

© sararue / instagram © The Big Bang Theory / CBS

12. Kate Micucci, who plays Lucy, as a toddler and in character

Illustration de l'article : 13 then and now photos of The Big Bang Theory's cast

© katemicucci / instagram © The Big Bang Theory / CBS

13. Christine Baranski is a lot less intimidating than her character, Dr. Hofstadter

Illustration de l'article : 13 then and now photos of The Big Bang Theory's cast

© christinebaranski / instagram © The Big Bang Theory / CBS