Chris Pratt/Instagram Chris Pratt shared a post on his Instagram Stories on Aug. 17 to mark his son Jack's 13th birthday The actor welcomed Jack with ex Anna Faris in 2012 Pratt also shares daughters Lyla and Eloise and son Ford with wife Katherine Schwarzenegger Chris Prattis officially a dad to a teenager! On Sunday, Aug. 17, the actor shared a post on hisInstagram Storiesto markhis son Jack's 13th birthday. "I have a teenager???" Pratt, 46, wrote in disbelief over a collage of rare photos of himself with his son, whom he shares with ex-wifeAnna Faris. "Jack, I can't believe you are 13 today. I've watched you grow into such an incredible young man, and am truly proud of the person you are becoming. I love you! Jesus is King," he continued. Chris Pratt/Instagram The collage featured photos of the father-and-son pair posing in matching jerseys with "Pratt" on the back, visiting a farm, attending sporting events and working on DIY projects together. Pratt and Faris, 48, split in 2017 after tying the knot in 2009. Their divorce was finalized in 2018. The former couple welcomed Jack on Aug. 17, 2012. https://people-app.onelink.me/HNIa/kz7l4cuf Jack was born prematurely and weighed only 3 lbs., 10 oz. The Marvel alum also sharesdaughtersLyla, 5, and Eloise, 3, and son Ford, 9 months, with his wife,Katherine Schwarzenegger. Chris Pratt/Instagram In June 2022, Pratt opened up toEntertainment Tonightabout the sweet connection between Jack and his younger siblings. "There's a big age separation... [and] he does a great job, he's so sweet with them," he said of his eldest child. "And they love him so much and they miss him when he's gone." Never miss a story — sign up forPEOPLE's free daily newsletterto stay up-to-date on the best of what PEOPLE has to offer, from celebrity news to compelling human-interest stories. The following year, the proud dad shared a post onInstagramfeaturing highlights of his outing to a Dodgers baseball game with Jack. "What a day! Jack and I got to hit the mound together, eat our bodyweight in Dodger Dogs and delivered the game opening announcement," Pratt wrote in the post's caption. In July 2024, Farisspoke exclusively to PEOPLEabout her fun tradition with Jack, sharing, "Every six months, he gets to choose an activity. Because we live in Los Angeles, sometimes it'll be Disneyland." "We haven't conquered Universal Studios yet. But going up to the San Diego Zoo, that kind of thing. And I love those mother-son trips," she added. Read the original article onPeople