This is Schwarzenegger's second child and the third for Pratt, who shares a son with ex-wife Anna Faris.
Chris Pratt dedicated a touching tribute to his wife Katherine Schwarzenegger on her 32nd birthday.
ET chats with Busy Philipps as she hypes this year’s ‘National Dog Show Presented by Purina,’ airing Thanksgiving Day on NBC.
The happy mom took to Instagram to share one year with her daughter, Lyla, and gushed over how grateful she is to be her mom.
Katherine, Christina and Patrick Schwarzenegger and Joseph Baena all wished their father a happy birthday.
The author tied the knot with Chris Pratt in 2019.
ET caught up with Chris Pratt at the premiere of 'The Tomorrow War,' premiering on Amazon Prime July 2.
ET spoke with the actor at the Los Angeles premiere of his new movie, 'The Tomorrow War,' on Wednesday.
The 'Tomorrow War' star opens up to ET about getting a visit from his family while filming in Iceland.
Only ET's Rachel Smith was on set with the stars of 'The Tomorrow War' ahead of its premiere July 2 on Amazon Prime Video.
Pratt turned 42 years old on Monday.
Plus, see Katherine Schwarzenegger's sweet anniversary tribute to her husband.
The new mom also opened up to Drew Barrymore about how life has been with their 9-month-old.
Katherine Schwarzenegger also talks husband Chris Pratt being a 'girl dad.'
