Chris Pratt celebrated his wife, author Katherine Schwarzenegger's birthday, by writing a sweet note for her on Instagram, on Monday. The actor also shared a series of photos featuring Schwarzenegger, who turned 32, in a swimsuit and smiling for the camera.

In the first photo, the author could be seen stepping outside the water wearing a black swimsuit with a huge smile. In the next photo, Schwarzenegger's mother journalist Maria Shriver planted a kiss on her cheeks.

In the next two photos, Schwarzenegger simply flaunted her broad smile for the camera while wearing a white top and a baseball cap with an American flag.

Pratt wrote a lengthy caption along with the photos. "Happy Birthday Honey!

You are such a wonderful wife, mother, step-mother, and life partner. I simply can’t imagine how lost I’d be without you," the 42-yrear-old noted.

The "Guardians of the Galaxy" star further praised his wife for being "beautiful, tough as nails, reasonable, deeply thoughtful, extraordinarily smart," and called her a complete boss who is eternally driven.

The actor further thanked Schwarzenegger for being supportive of him and helping him grow in the past couple of years.

"We fit so perfectly into each other’s lives that our Union is a daily reminder that God is looking out for us," Pratt continued. "Navigating the odd circumstances of our world is a task I cannot handle alone."

The actor noted that he is grateful he doesn't have to deal with the odd circumstances of life alone. "Your commitment to helping others is contagious. I’m just so grateful for the harmony you continually bring to our household. I love you so much honey. Happy Birthday!" he concluded.

Pratt and Schwarzenegger got married in 2019 and they have a one-year-old daughter together named Lyla Maria Pratt. The actor also shares a 9-year-old son Jack with his ex-wife, actress Anna Faris, who revealed in August that she got married cinematographer Michael Barrett.

Schwarzenegger's father, actor Arnold Schwarzenegger also took to Instagram on the same day to share a throwback photo of him and his daughter looking at a dinosaur when she was a kid.

Katherine Schwarzenegger responded to her father's sweet post, "Thank you daddy love you."

On the work front, Pratt will next feature in "Jurassic World: Dominion," which is scheduled for June 10, 2022 release.

chris pratt and katherine
Actor Chris Pratt, pictured on Feb. 2, 2019 in Westwood, California, is reportedly getting in shape before marrying Katherine Schwarzenegger, pictured on Feb.12, 2019 in Beverly Hills, California. Gregg DeGuire/Matt Winkelmeyer/Getty Images