InstagramChris Pratt is sending some unconditional love to Katherine Schwarzenegger on her 29th birthday.
In what marks one of the only times Pratt has ever discussed their relationship publicly, the Guardians of the Galaxy star took to Instagram on Thursday with a heartfelt message for his girlfriend of at least six months.
"Happy Birthday Chief!" Chris, 39, captioned a series of never-before-seen snapshots of the couple. "Your smile lights up the room. I've cherished our time together. Thrilled God put you in my life. Thankful for the laughs, kisses, talks, hikes, love and care."
In one especially adorable photo, the A-list actor plants a kiss on Katherine's cheek, who is also shown giving her man a pedicure and posing for a selfie while doing a face mask. Chris also shared a few shots of Katherine smiling for the camera, as well as a religious wood carving he most likely created for her.
Chris and Katherine have been practically inseparable since photos of the duo indulging in a romantic picnic made headlines last June.
And just last night, Chris enjoyed some quality time with Katherine's younger brother, actor Patrick Schwarzenegger, at a Los Angeles Clippers game.
So what makes this Hollywood relationship the real deal? A source recently told E! News, "From the moment they met, it just seemed different for Katherine. This is definitely the most serious relationship she has had. They haven't been together that long but everyone is rooting for an engagement to happen soon."
In honor of Katherine's special day, check out all of her and Chris' cutest moments by scrolling below!
In June 2018, an insider tells E! News that the Jurassic World star is "smitten" with his new girlfriend, adding that he's "super happy" about the start of their blossoming relationship.
Chris and Katherine take things to the next level by spending time with the Schwarzenegger family. As it turns out, the one and only Maria Shriver played matchmaker for the couple!
Judging by photos shared online of the these September 2018 festivities, Chris' family and friends welcomed Katherine with open arms as they all posed together for group photos.
Chris and Katherine are all smiles during their outing with Pratt's brother Cully Pratt and friends.
The two hold hands and are all smiles, as they step outside for an afternoon stroll.
The dynamic duo looks over-the-moon in love, during their afternoon outing.
The pair soaks up the sun and spends time with Katherine's family in Hyannis Port, Mass.
The two showcase denim looks as they leave Beauty & Essex after enjoying dinner together in August 2018.
The two ride Bird scooters around her mom's neighborhood in early August 2018.
Nothing to hide here! The lovebirds sport casual looks on a dinner date at R+D Kitchen in Santa Monica, CA in late August 2018.
The two are seen out and about in L.A. after attending a Boy Scout Troop meeting in November 2018.
"Happy Birthday Chief!" Chris, 39, captioned a series of never-before-seen snapshots of the couple. "Your smile lights up the room. I've cherished our time together. Thrilled God put you in my life. Thankful for the laughs, kisses, talks, hikes, love and care."
Congratulations are in order, because Chris has officially popped the question. The duo announce their engagement in January 2019, with the future groom writing on Instagram, "Sweet Katherine, so happy you said yes! I'm thrilled to be marrying you. Proud to live boldly in faith with you. Here we go!"
On the topic of wedding planning, an insider tells E! News in March that the celebs are "taking their time," but look forward to including Pratt's son Jack in the ceremony possibly as a "little groomsman."
The two make their red carpet debut as a couple at the Avengers: Endgame premiere in Los Angeles in April 2019.
Katherine is spotted arriving to her star-studded bridal shower, which a source describes as "beautiful and elegant." Oprah Winfrey is among attendees.
The couple exchange their vows and say "I Do" in a romantic California ceremony.
The Marvel star adorably crashes the author's baking video.
In April 2020, E! News learns that the couple is expecting their first child together. Four months later, Katherine's brother Patrick Schwarzenegger confirms she has welcomed a baby.
Happy birthday, Katherine!