Kate captioned the photo "My loves of my life ☀️" and shared it with her 10.4m followers.
The actress spoke last year of her wish for more children.
She opened up about her relationship with boyfriend Danny Fujikawa to the UK Times, including whether or not they planned to have kids together.
"I’d like to! I’m not done yet. A girl would be fun," she revealed at the time.
Lucky for Kate, the couple welcomed their daughter Rani on October 2.
To commemorate her boyfriend's first Father's Day, which was last Sunday in the US, Kate shared a video of Danny showering their baby girl with kisses.
"EVERYTHING ❤️" Kate captioned the post.
So cute!
