Arnold Schwarzenegger Seen in Rare Photo With His Grandchildren

Arnold Schwarzenegger celebrated his 77th birthday on Tuesday, and Chris Pratt paid tribute to his father-in-law on social media with a rare photo of the multi-hyphenate actor, businessman, former politician, and professional bodybuilder with his two grandkids.

"Happy Birthday Arnold!" the 45-year-old actor wrote. "You’re one of a kind. Looking forward to another year of sage advice, good cigars, chess whoopings, and hand-feeding homemade cookies to the many barn animals that live in your kitchen."

In the accompanying photos...