Robert Redford's Favorite Movie Role of All Time Is...

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We all have our own favorite Robert Redford movies, but which one does he like best? ET went straight to the source!

"Butch Cassidy -- that was my favorite role, playing the outlaw," Redford told ET.

WATCH: Robert Redford Brings the Laughs With Nick Nolte in 'A Walk in the Woods'

The Oscar winner starred in Butch Cassidy and the Sundance Kid opposite his late pal Paul Newman. The onscreen duo planned to work together again in Redford's upcoming movie A Walk in the Woods, but Newman passed away before filming began. Instead, the comedy shows Redford hiking and camping across the entire Appalachian Trail with Nick Nolte by his side.

Six decades of being a leading man in Hollywood means co-starring with dozens of leading ladies, including Mia Farrow and Meryl Streep. Brittney Hopper, from our Los Angeles affiliate, wanted to find out who was the best kisser.

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"I've loved all the women I've kissed," Redford said. "If you stop to think about it, I've kissed some of the best, and they've all been a pleasure."

Redford, who revolutionized the industry through his films and the Sundance Film Festival, turned 79 on Tuesday, and ET brought him a gift that hearkened back to his first professional role.

"I read that your first professional paying acting gig you said, 'Pay me with a fishing pole,'" Hopper told Redford before presenting him with a fishing lure.

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"That's a great lure," Redford said. "It's really beautiful."

A Walk in the Woods opens Sept. 2.