Adorable! Bruce Willis Bonds With Daughter Mabel, 7 Months, on RED 2 Set

Bruce Willis and his 7 months old baby daughter Mabel in London on November 12, 2012.  Ian Lawrence/Splash News

Bruce Willis isn't as tough as he looks!

Though he plays a gun-toting former black-ops CIA agent in Red 2, the 57-year-old actor showed off his softer side while spending time with his 7-month old daughter, Mabel, in between takes in London. Nov. 2. Willis smiled wide as his little girl — wearing a denim ensemble with floral details — giggled on the set of the action movie, which also stars John Malkovich, Mary-Louise Parker, Anthony Hopkins, Catherine Zeta-Jones and Helen Mirren.

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Mabel is the first child for Willis and his wife, British model Emma Heming, 34. "Two bottom teeth. Check. Two front teeth. Coming in! Always exciting for this first-time mom," Heming tweeted Nov. 11.

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Willis has three other daughters — Rumer, 24, Scout, 21, and Tallulah, 18 — with ex-wife Demi Moore, 50. Earlier this year, Willis shared some lessons he's learned as a father with Esquire. "Take responsibility for when you are wrong. They hear you own up, and they learn to own up," he said. "You have to give them a code, beginning with things like, 'Don't bite people.' That becomes something like, 'It's not okay to be mean. Ever.' That was our watchword when the girls were younger."

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Most importantly, Willis told the magazine, is to make his daughters crack up. "You gotta do the drool-take, gotta make them see that goofiness is still safe," he said. "You have to make them laugh at you."

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