Chris Pratt and Katherine Schwarzenegger are adding a sibling for their 16-month-old daughter Lyla and Pratt’s 9-year-old son Jack from his previous marriage.

Now their reps have not commented, but multiple sources confirm it to PEOPLE exclusively.


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“You’re beautiful, tough as nails, reasonable, deeply thoughtful, extraordinarily smart, you’re a complete boss, eternally driven and you communicate like no other,” he continued. “Thank you for everything.”

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