Malcolm In The Middle Co-stars

Erik Per Sullivan plays the way cute Dewey.

Frankie Muniz plays Malcolm, the main guy(in case u didn't know that). Did you know that he's actually older than Justin? Just an interesting tidbit that I thought I'd share.

Christopher Kennedy Masterson plays the oldest brother, Francis.

Jane Kaczmarek plays the mom of the family, Lois.

Bryan Cranston plays the Dad of the family, Hal.

Craig Lamar Traylor plays Stevie, Malcolm's best friend.