Michael Douglas on Life After Cancer: 'This Is My Third Act'

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Michael Douglas opened up to ET about beating cancer and how his latest movie Ant-Man represents a new chapter in his life.

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"I look at this generally as my third act," Douglas told ET. "I am also happy. I am cancer-free now, so you have a new appreciation and I think the combination of Behind the Candelabra and Liberace and now Ant-Man sort of opens my resume and my range of parts to play."

Douglas, 70, has been cancer-free since January 2011 after being diagnosed with stage four throat cancer in 2010.

Sadly, his mother Diana lost her battle with cancer on July 4 at the age of 92. The two-time Oscar winner was at the London premiere of Marvel's Ant-Man just days later, holding his family close. He told us that they had a tremendous influence on his decision to take on the role.

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"My kids just loved the idea," Douglas said. "They were just enthused by the idea. My kid advised me and said, 'Dad, this is a whole new audience for you. Just remember that.'"

Douglas plays Dr. Hank Pym, mentor to con-man Scott Lang (Paul Rudd), in Ant-Man, opening July 17.