The comedian helped spread a little early holiday cheer Friday when he came to the aid of a mom-to-be who went into labor at a New Jersey shopping mall.
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Rock, 45, was shopping at Neiman Marcus at the Garden State Plaza mall when a woman's water broke a few feet away from him, just as she was about to step on the escalator.
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The Grown Ups star, who has two kids with wife Malaak, used his trademark humor to keep the woman -- and a crowd of concerned shoppers -- calm until an ambulance was called.
"He was making the crowd and the woman in labor laugh," an eyewitness tells Us. "She recognized who he was immediately and he stayed there until the paramedics took her away."
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No word yet on the mother and child's condition
It looks like Justin Bieber going to be sharing the stage with another Smith family member.
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On Wednesday, Willow Smith announced that she'll be joining the 16-year-old pop star on the European leg of his My World tour.
VIDEOS: Justin Bieber in videosMove over, Jaden! "Got news that my big bro @justinbieber invited me on his European Tour in March..so exciting!" she wrote on Twitter . "Maybe I'll let Jaden come..LOL #NEVERSAYNEVER" Justin then retweeted her message and followed it up with his own note to the 'Whip My Hair'....