01/04/2012 01:25 pm ET

Rob Lowe: Playing Drew Peterson Was Huge Challenge (VIDEO)

By now, you've probably seen the ridiculously awesome (and/or laughably bad) trailer for the Lifetime's "Drew Peterson: Untouchable" movie that stars Rob Lowe as the police sergeant and accused wife-murderer. The trailer went viral immediately after it was released, due in large part to the absurdity of Lowe delivering the instantly classic line, "I'm unoutchable, bitch."

Lowe stopped by "Good Morning America" (weekdays, 7 a.m. EST on ABC) on Wednesday, where he talked to Robin Roberts about the challenges of playing the dark role, and why he chose to get involved with the project. "I felt like I was sort of the last person that made sense to play Drew, which was exactly why I ended up saying, 'yes.' This is what I live for, to do somethign that is so unlike what I do every week on 'Parks and Recreation' or 'The West Wing' ... it's about as far on the end of my range as I can probably go," Lowe said. The role is indeed a huge departure for Lowe, who plays the peppy, detail-obsessed, alternately overly friendly and formal state auditor Chris Traeger on the NBC comedy.

As the broadcast cut to a scene from the movie where Lowe, as Peterson, was getting physically abusive with his wife, Lowe, perhaps taking the method-acting a bit too far, quipped that, "If things don't go well with my own wife, I'm just going to show her that clip." Just as long as he doesn't think he's "untouchable, bitch."

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