Katherine Schwarzenegger and Chris Pratt share three children, daughters Lyla and Eloise, and son Ford. Here is everything to know about the couple's children.

Katherine Schwarzenegger shared a rare glimpse into life with her and husband Chris Pratt’s family ahead of her dad Arnold Schwarzenegger’s 78th birthday celebrations.

Katherine Schwarzenegger had a fun-filled summer! The "Good Night, Sister" author and daughter of Arnold Schwarzenegger shared a carousel of family photos and a video on Instagram Saturday, giving fans a rare glimpse into her life with husband Chris Pratt and her siblings.

Schwarzenegger and Pratt share daughters Lyla, Eloise Christina, 3, and son, Ford Fitzgerald, 8 months. Pratt also shares son, Jack, with ex-wife Anna Faris. His eldest child turns 13 on Sunday, Aug. 17. Pratt, 46, also commemorated his daughter’s birthday with a collage on his Instagram Stories.

The couple have put their sprawling Pacific Palisades, Calif., mansion back on the market with a significant price cut, and are said to be renting a home from Katy Perry.

The topic came up while talking about his cousin in-law, controversial Health and Human Services Secretary Robert F. Kennedy Jr.

Chris Pratt marked his and Anna Farris’ son Jack’s milestone 13th birthday with a look inside their close relationship: "I’ve watched you grow into such an incredible young man.”