"I've been hanging with them kids, people been whippin' their hair and karate-kidding around my house," said Smith, referring to the "Whip My Hair" song by his daughter, Willow, and "The Karate Kid" film, starring his son, Jaden.
"You know what happened is, my youngest son, Jaden, he's very serious about acting, so he's taking it all and working out, and he's looking at me funny across the dinner table now. Now he's looking at me like a mark, so I'm like, 'OK, let me go ahead and hit this young boy with a big one. Keep him settled down a little bit," Smith said.
The film gives viewers more of what we've come to expect from the franchise: action, aliens, effects and humor. In a time-traveling twist, Josh Brolin plays a young Tommy Lee Jones.
"Men in Black 3" also takes things to completely new heights in 3D. Having director Barry Sonnenfeld again in charge meant Smith had no reservations about returning to the "Men in Black" family.
"You know, we've created something that when people look back at it 50 years from now, there's not going to be a lot of things like 'Men in Black.' 'Men in Black' is truly a standout franchise," said Smith.