Justin Timberlake: 'I'm Not Afraid of the Idea of Aging'

Actor/singer Justin Timberlake sat down with "Extra's" Maria Menounos to talk about his new action sci-fi thriller, "In Time," in which time is literally money.

Set in a fictitious future, a person is born with only 25 years of life for free. After that, a time clock turns on that gives them one more year. The poor spend it racing around, trying to find more time -- and ultimately failing -- while the rich continue to gain all the time in the world.

Timberlake said, "I'm not afraid of the idea of aging. You meet someone who's like 80 years old, and they don't see themselves as 80 years old. Tell Mick Jagger how old he is. He's still all up on stage doing his thing, man."

The star did love playing the action hero. "I'm shooting guns and flipping cars and I'm kicking the bad guy's ass and kissing a hot girl. I'm in."

His co-star Amanda Seyfried admitted she has had panic attacks over being in the public eye too much, but now realizes she has wasted too much time on it.

"I'm not putting so much weight on anything and not taking anything too seriously," said Seyfried. "It really is the key I realized."

The clock starts October 28 when "In Time" unwinds in theaters.