Rob Lowe plays real-life accused killer

To cast Rob Lowe as Drew Peterson, a former cop indicted for his wife's death, requires vision.

"I was very gratified they came to me with it, because I don't think on paper I would be in the top five guys you would think of," Lowe says.

In "Drew Peterson: Untouchable," premiering tomorrow at 8 p.m. on Lifetime, Lowe is camouflaged as the heavier and homelier disgraced cop.

OLDER AND FATTER LOWE It took five hours to strip the color from his hair and dye it gray, Lowe says. Then there was makeup and letting himself go.

"I just stopped all my activity," Lowe says. "I ate what I wanted to eat. I put on as much weight as I could in the short time I had."

"There are scenes where they have me in a high-tech fat suit at the end of the movie, [when] I am doing a striptease," he says. "When I did it, I thought, 'Boy, I don't think it will work.' "

Lowe refers to Peterson's arrest, when Peterson danced a jokey striptease for former colleagues. "Drew Peterson: Untouchable" is the unsettling story of the Bolingbrook, Ill., cop, married to his third wife when he became lovers with Stacy (Kaley Cuoco), 30 years his junior. Peterson's then-wife was found dead in the tub, her demise ruled an accidental drowning, curious given the lack of water. Peterson is indicted and imprisoned, awaiting trial on charges of killing her.

SEE PHOTOS25 biggest movie opening weekends

STACY'S FATE He later married Stacy, who subsequently disappeared. She was assumed murdered, but her body has never been recovered.

"I think he is the creepiest man on this planet, one of those chummy and fun guys who mess with the guys and flirt with the girls," Cuoco says.

Stacy was young and extremely impressionable, while Peterson was older. What initially appears as a commanding, take-charge attitude was just a prelude to excessively controlling her.

"He charms the hell out of her," Cuoco says. "And she just fell under his spell; that happens a lot with these young girls. And they fall into the wrong set of arms, and the saddest thing is we don't know where Stacy is. The worst thing is to not have evidence."