The lovebirds married during a dreamy ceremony in Montecito, California, where the bride wore not one, but two custom Giorgio Armani Privé wedding dresses. Three years later, they are still big fans of each other.
"Happy Anniversary to my strong, gorgeous, smart, lovely, organized, tough, kind, compassionate, wife," Pratt, 42, wrote on Instagram. "I’m a lucky man. God is so good. The kids and I are so grateful to have you. You do so much to better our lives."
Schwarzenegger, 32, shared a similarly gushy message to her "angel face" on her account.
"You make me laugh, feel so loved and supported, you fix everything, you’re the best postpartum caretaker —making me soups every night — and to watch you love me and our family is the greatest joy," she wrote.
In honor of the couple's constant public displays of affection, we're looking back at their most swoon-worthy moments, from their fairy tale wedding day to making quarantine banana bread.
Welcoming baby Eloise
On May 22, the couple shared that Schwarzenegger gave birth to a healthy baby girl named Eloise Christina. "We are so excited to announce the birth of our second daughter," the proud parents wrote on their respective Instagram accounts.
"We feel beyond blessed and grateful," they wrote and signed off: "Love, Katherine and Chris."
Eloise joins sister Lyla, 1, and big brother Jack, 9, whom Pratt shares with ex-wife Anna Faris.
“It's truly remarkable,” Pratt told USA TODAY of childbirth, ahead of Eloise's arrival. “To see life in its first moment, to see the very first breath, is just for me very moving."
But don’t expect a flood of baby photos from the couple, as that’s not their style.
The author and the "Jurassic World: Dominion" star agreed to keep their child’s face off social media until she is old enough to make her own choice.
“It's something that's really important to my husband and I to give to our kids and to be able to have that privacy, and not necessarily show much of them on social media,” Schwarzenegger told Hoda Kotb during an appearance on the “Today” show in March 2021.
Chris Pratt praises wife's 'pure heart'
On Nov. 2, 2021, Pratt wrote a loving post to his wife and pinned it as an early birthday present.
"We met in church. She’s given me an amazing life, a gorgeous healthy daughter, she chews so loudly that sometimes I put in my ear buds to drown it out, but that’s love," Pratt wrote on Instagram. "Her heart is pure and it belongs to me."
He added: "It’s her birthday in about 6 weeks. So if I don’t get her anything, I’ll tell her to look back on this post. Love you honey."
Second anniversary celebration
Pratt and Schwarzenegger also shared mushy anniversary posts on their second anniversary in 2021.
The "Guardians of the Galaxy" star called Schwarzenegger his "dearest love" and wrote about his wife clipping his toenails and "suffering from indigestion due to eating too much curry" all while maintaining her "beautiful smile." Schwarzenegger, daughter of Arnold Schwarzenegger and Maria Shriver, called Pratt her "love angel face" and wrote she was "forever grateful to God" for bringing them together.
For their anniversary celebrations, the couple mowed down on In-N-Out burgers and Pratt gifted his bride a "nice piece of jewelry," Pratt told USA TODAY at the time.
"They say the second anniversary is supposed to be wood or paper or something like that," Pratt said. "I went with diamonds because I've been gone a lot. I'm sure she won't object."
Going Instagram official
You know a couple is getting serious when they make their partnership Instagram official. Pratt and Schwarzenegger hit that relationship milestone on Dec. 13, 2018, Schwarzenegger's birthday.
"Happy Birthday Chief! Your smile lights up the room," Pratt shared alongside a collection of photos of himself and his then-girlfriend goofing around. "I’ve cherished our time together. Thrilled God put you in my life. Thankful for the laughs, kisses, talks, hikes, love and care."
Sharing their dreamy wedding day
Pratt popped the question in January 2019, months after the pair had people guessing if they were an item when they were spotted together in June 2018.
The day after their wedding, the couple shared a photo and message describing their big day.
"Yesterday was the best day of our lives," they each captioned the post on their respective Instagram accounts. "We became husband and wife in front of God, our families and those we love. It was intimate, moving and emotional. We feel so blessed to begin this new chapter of our lives ... This morning we feel nothing but blessed."
Welcoming baby Lyla: 'Extremely blessed'
First comes love, then comes marriage. You know what's next: The couple welcomed a daughter, Lyla Maria Schwarzenegger Pratt, in August 2020, and Pratt was full of bliss.
"We couldn’t be happier," Pratt wrote in an Instagram post with a photo of himself and Schwarzenegger holding the baby's hand. "Both mom and baby are doing great. We are extremely blessed."
Pratt has previously shared that his wife was destined to be a great mom in a video clip for People.
"She has changed my life for the better in so many ways," Pratt said, nothing that she had already been a great stepmom and that his heart, soul and son are safe with her.
"She’s, God willing, going to be a great mom one day. She’s got great parents, great siblings, she fills in all my many deficits."
Schwarzenegger talked up her hubby in May on "The Drew Barrymore Show."
"It's so beautiful to be able to watch him step into this new role of being a girl dad, and he's the best husband and best dad, and I feel so grateful every single day for him," she said.
Relationship timeline: Anna Faris says she 'ignored' warnings in Chris Pratt marriage
Katherine Schwarzenegger celebrates Chris Pratt's on first Father's Day
Schwarzenegger paid gushing Instagram respect to her "love angel" on the couple's first Father's Day after the birth of Lyla Maria.
"Watching you as a father has been one of the greatest joys and watching you become a girl dad to Lyla Maria has melted my heart!" she wrote alongside a photo of Pratt wearing a "Girl Dad" t-shirt. "I've fallen in love with you all over again."
"These kids are blessed to have you as their daddy, and I'm beyond blessed to witness you as a father every day," Schwarzenegger added. "I love you!"
How they spent their pandemic lockdown
Schwarzenegger isn't just a great mom, she's also a great baker, boasts Pratt.
While they quarantined at the onset of the pandemic, the influencer took to Instagram Stories to share a baking tutorial with her followers when her bearded husband decided to crash the party, and naturally, compliment his wife.
"I'm here to attest that Katherine's banana bread (is) truly remarkable," he said. "I love it. I got a little giddy inside when she said both of those loaves were for us."
"They'll be gone in less than a day," he added, before throwing some bread in his mouth. "Good job, babe."
Finding 'the greatest gift ever'
Their feelings are mutual. Schwarzenegger is just as vocal about her spouse.
“When you have a partner who can love and support you throughout everything, that’s the greatest gift ever,” she said during an interview with Us Weekly last year. “I’ve always felt incredibly supported by my siblings and my parents, but to have that in a partner and in my husband is another amazing gift to have.”
She added that Pratt was her "support system" as she worked on her latest book, "The Gift of Forgiveness."
“We try to be each other’s greatest cheerleaders,” she said. “It’s very important to the both of us.”
Contributing: Sara M Moniuszko, Jenna Ryu, Charles Trepany, Carly Mallenbaum, Elise Brisco, Edward Segarra and Brian Truitt
This article originally appeared on USA TODAY: Chris Pratt, Katherine Schwarzenegger: A timeline of love