Rob Lowe on Playing Drew Peterson: 'Why Do You Want Me?'

When approached about playing Drew Peterson, the former Bolingbrook Police Department officer who is now accused of killing one of his wives, Rob Lowe had the same reaction most of us had: why me?

Lowe appeared on ABC's Good Morning America on Wednesday and spoke to Robin Roberts about the Peterson role.

"I quickly said why do you want me," Lowe said, when asked how he reacted about being offered the gig. "I felt like I was the last person that made sense to play Drew, which is exactly why I ended up saying yes, because I knew it would be such a departure for me."

To view the entire interview, which also includes a few more scenes from "Untouchable", CLICK HERE.

The movie has been in the works for nearly a year and will air on Lifetime on Jan. 21. In June, it was reported .

The movie is based off of Shorewood Patch Editor Joseph Hosey's book Fatal Vows: The Tragic Wives of Drew Peterson.

The film explores the two cases in which one of Peterson's wives was killed and another mysteriously disappeared and also features Kaley Cuoco, who stars the Big Bang Theory, as Stacy Peterson. 

To view the Lifetime trailer, CLICK HERE.

Lowe said playing Peterson was a complete change of pace to what he's used to playing.

"This is what actors live for," he told Roberts on Good Morning America. "To do something that is so unlike what I do on 'Parks and Recreation' or 'The West Wing' ... it's about as far on the end of my range as I can probably go."

Peterson allegedly drowned his third wife, Kathleen Savio, in March 2004 but was not arrested until the disappearance of his next wife, Stacy Peterson, attracted attention to her death.

Peterson has been in jail ever since awaiting trial.

In February, the appellate court heard arguments from prosecutors and defense attorney Steve Greenberg over what—if any—hearsay evidence can be used against Peterson at his murder trial.

Will County State’s Attorney James Glasgow had brought the case to the appellate court in a bid to reverse Judge Stephen White’s decision to exclude most of the 13 hearsay statements he wants to use against Peterson.

The case had ascended all the way to the state's highest court, but just last week, the  to take the case again and make up its collective mind about it.

Peterson will likely spend at least another three months in jail before his trial could conceivably start, meaning he won't likely be able to see the movie when it airs.