Marmaduke Grylls: My Dad is a Bear!

Survival expert Bear Grylls plays with son Marmaduke, 19 months, at the Hard Rock Cafe’s celebration for the Step It Up campaign on Tuesday in New York City.

Bear, 33, is most well known for battling the elements at various locations around the world on Discovery Channel’s Man vs. Wild. He was also seen posing earlier today with British singer Natasha Bedingfield (pictured below).

20+ pictures inside of Bear Grylls stepping it up…