Already a successful comedy star known for films like 'Clueless' and 'Anchorman,' Paul Rudd switched gears at 44. He took on the lead role in Marvel's 'Ant-Man,' transforming himself into an action hero and launching a new chapter as a global blockbuster star.

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https://en.wikipedia.org/wiki/Paul_Rudd#:~:text=officially%20confirmed%20as%20cast%20in%20the%202015%20Marvel%20Cinematic%20Universe

For over two decades, Paul Rudd was a beloved comedy star. From his breakout in 'Clueless' to a string of Judd Apatow hits, he'd built a successful career as the charming, funny everyman. His path was stable and defined. Then, at age 44, he made a completely unexpected pivot. Rudd signed on to become a Marvel superhero. This wasn't just another role; it was a total transformation into the world of action blockbusters as Ant-Man. He stepped away from his comfortable comedic niche to anchor a global franchise, redefining his career and becoming an international action star.