Chris Pratt Shared The First Picture Of Daughter Lyla To Celebrate Katherine Schwarzenegger's Birthday, But There Was A Teeny-Tiny Catch

"I'm so glad to be home with you and Lyla."

Chris Pratt celebrated the birthday of his wife, Katherine Schwarzenegger, over the weekend by posting his first picture of their 4-month-old daughter, Lyla.

Axelle / FilmMagic

Back in August, Katherine gave birth to the couple's first child together, announcing the news in an Instagram post that revealed they'd named their daughter Lyla Maria Schwarzenegger Pratt.

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"We are beyond thrilled to announce the birth of our daughter," Katherine wrote. "We couldn't be happier and we feel extremely blessed!"

Instagram: @katherineschwarzenegger

In a matching post, Chris added: "Both mom and baby are doing great."

But since then, the couple have been happy to enjoy some private time with their newborn daughter, so fans were more than excited when Chris offered a sneaky picture on Sunday.

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"Happy Birthday Sweetie! You have brought so much light into my life," Chris said in tribute to Katherine. "I'm so glad to be home with you and Lyla."

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"You're a great mom, a great step-mom, a great wife, daughter, sister and friend," the post continued. "The world is brighter with you in it. I am one lucky man. Thank you for the love, support and partnership. I love you."

And right there, among the memories, was a picture of the mom and daughter together, appearing to browse Christmas trees. The only catch was, of course, an image of Santa covering Lyla's face...

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Maybe Chris is taking advice from Ryan Reynolds, who posted something similar after Blake Lively gave birth to their third daughter, Betty.

Twitter: @VancityReynolds

Best friends in the making!

Twitter: @VancityReynolds, instagram.com

In a post of her own, Katherine also credited her daughter with giving her a "whole new outlook" after giving birth.

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"I have a whole new outlook on birthdays after giving birth this year, so today I toast my parents for creating me and my mama for birthing me!" she wrote. "I'm so grateful for both of you, your love and our family."

The post continued: "I'm also grateful I grew up to marry a man who woke me up with this happy birthday latte he made. I love him so!"

This follows another message that Katherine posted recently, in which she opened up about being pregnant and becoming a mother during the coronavirus pandemic, and how giving birth had given her a "big silver lining of joy and light" during a tough year.

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"2020 has been a crazy year, it's not what any of us expected; it's been filled with a lot of challenging times and unpredictable twists and turns," the post read. "It has also been a year of immense joy for those of us who have welcomed life into the world. Being pregnant in a pandemic and having a baby too, was not how I expected my pregnancy and becoming a mother to go, but I couldn’t be more thrilled and grateful to have my little Lyla Maria in my life and to be able to be her mom."

Katherine finished: "Shout out to all the people who had babies this year, became pregnant, are pregnant, or are trying to get pregnant. It's a wild time to embark on this journey of motherhood and I see you!"