Then: Michael Chiklis
Now: Jamie Bell
Age: At 42, Chiklis was substantially older at the time he played Ben Grimm than 27-year-old Bell.
Pedigree: Chiklis was (and still is) best known for The Shield, while Bell's been in the spotlight since his breakout role in 2000's Billy Elliot. He's been in a number of drama and action films since then, including the highly controversial upcoming movie Nymphomaniac.