Photo: Katherine Schwarzenegger/Instagram. Inset: Matt Winkelmeyer/Getty

Katherine Schwarzenegger, Lyla

Maria Shriverloves to spend time with her granddaughter!

On Sunday,Katherine Schwarzenegger Pratt, 31, celebrated her mom’s birthday with a sweetInstagram tribute, which included photos of Shriver with her 14-month-old granddaughter,Lyla Maria, whom Schwarzenegger Pratt shares with husbandChris Pratt.

“Happy birthday to the Queen!@mariashriverI love you more than you know! You’re the best mama and mama g and all around human!” Schwarzenegger Pratt captioned the post. “We celebrate you today and always! Our hero, our rock, our guiding light! Happy happy!!”

Never miss a story — sign up forPEOPLE’s free daily newsletterto stay up-to-date on the best of what PEOPLE has to offer, from juicy celebrity news to compelling human interest stories.

PHOTO: Katherine Schwarzenegger/InstagramPHOTO: Katherine Schwarzenegger/Instagram

Katherine Schwarzenegger, Lyla

Katherine Schwarzenegger, Lyla

Last week, the mom of one shared a sweet photo to social media with her daughter, holding her little girl while walking through a garden.

“Just me and my 🐣 (and her daddy who took this pic 🥰),” she wrote.

Pratt and Schwarzenegger Pratt, who began dating in 2018 and have been married since 2019, welcomed daughter Lyla in August 2020. He shares 9-year-old son Jack with ex-wife Anna Faris.

The couplecelebratedtheir two-year wedding anniversary in June.

source: people.com