by Ellen DurneyBuzzFeedBuzzFeed StaffHi, I'm Ellen! You know Jack Black. He's the beloved star of iconic movies like School of Rock, Kung Fu Panda, and The Holiday. Karwai Tang / Getty Images But did you know that he's been married for two decades? And has two kids? Because I'm not sure that I did, and I claim to be an expert in this kind of thing... Simon Ackerman / Getty Images So, on Sunday, Jack took to Instagram to celebrate the 20 years of marriage to Tanya Haden, with whom he shares two sons, Sammy and Tommy. @jackblack / Via instagram.