Danny & Chris

Image credit: Danny and Chris Masterson: Dennis Clark/Getty Images

AGES 26, 22

BREAKTHROUGH MOMENTS These brothers have cornered the snarky troublemaker market on Fox: Danny broke through with his role as smartass stoner Hyde on ''That '70s Show,'' and little brother Chris followed up as smartass big brother Francis on ''Malcolm in the Middle.''

WHAT THEY'RE DOING NOW New seasons of their series, which are aging gracefully.

WHAT'S NEXT When their TV shows ride into the sunset, they can always return to the big screen: Danny starred in 1998's ''The Faculty'' and 1997's ''Face/Off'' while Chris made a noble attempt at funny in 2001's otherwise hopeless ''Scary Movie 2.''

VERDICT It's a tie. Tell the truth: Except for the hair, can you really tell these two apart?