07/06/2012 05:52 pm ET

Hollywood's Biggest Transformations: 'Breaking Bad' Actor Bryan Cranston's Surprising Roots (PHOTOS)

He’s back.

Everybody's favorite drug dealer is gearing up for his July 15 comeback when "Breaking Bad" returns for its fifth and (sadly) final season. But the unassuming high school science teacher-turned-meth-dealer Walter White is a far cry from actor Bryan Cranston's small screen roots. Though you may recognize him from his pantsless crystal-cooking scenes on the AMC drama, Cranston actually rose to fame as Hal, the lovable, goofy dad from “Malcolm in the Middle."

And Cranston isn't the only actor to go through a major on-screen transformation. Check out these celebs who have made a name for themselves playing wildly different characters.