Mark Walhberg on 'Transformers: Age of Extinction,' Being an Overprotective Dad

"Extra" special correspondent Holly Hannula was in Hong Kong with "Transformers: Age of Extinction" star Mark Wahlberg as he promoted the movie and chatted about why he finally joined the cast. Mark, who plays a father trying to protect his daughters in the movie, said that in real life he's "far more protective" than his character.

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