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.

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  • Bryan Cranston as Hal in "Malcolm in the Middle"

    (Getty)

  • Bryan Cranston as Walter White in "Breaking Bad"

    (AMC)

  • Michelle Williams as Jen Lindley in "Dawson's Creek"

    (Columbia TriStar Television)

  • Michelle Williams as Marilyn Monroe in "Marilyn"

    (Getty)

  • Gerard Butler as The Phantom in "The Phantom Of The Opera

    (Warner Bros.)

  • Gerard Butler as King Leonidas in "300"

    (Warner Bros.)

  • Edward Norton as The Narrator in "Fight Club"

    (20th Century Fox)

  • Edward Norton as Derek Vinyard in "American History X"

    (New Line Cinema)

  • Naomi Watts as Cristina Peck in "21 Grams"

    (Focus Features)

  • Naomi Watts as Princess Diana in the upcoming "Caught In Flight"

    (Splash)

  • Christian Bale at a screening of "The Machinist"

    (Getty)

  • Christian Bale as Dicky Elkund in "The Fighter"

    (Relativity Media)

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