Dermot Mulroney: There aren’t enough R’s to rate ‘Dirty Grandpa’

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Dermot Mulroney is starring alongside Robert Deniro and Zac Efron in the new comedy "Dirty Grandpa.” He speaks to TODAY’s Al Roker, Tamron Hall, Willie Geist, and Natalie Morales about what it’s like to play Zac Efron’s dad in the raunchy film, and he reveals the hidden talent that has finally achieved “cool” status.