Relive Gavin Casalegno and Larsen Thompson's Storybook Romance

For Thompson's sweet sixteen, Casalegno surprised her with an impromptu visit when the two had been seeing one another for only a couple of weeks. Speaking with Seventeen in a June 2022 interview, the actor shared more details about the grand romantic gesture. "I'm kind of a hopeless romantic myself. I'm all about it. I think the craziest gesture was when my current girlfriend had her 16th birthday party, and I had only spent like a week with her at that point," he said.

"I lived in Texas at the time and she was inviting all of her friends to the party, and at this point, I was already talking to her parents. I secretly bought a plane ticket out to go surprise her for her 16th. Her parents brought her to some restaurant at Universal Studios, and I jumped out of the corner and fake proposed with a Hershey's kiss." Casalegno added that it was after his arrival that he realized Thompson's dad had been standing right there: "It was hilarious. We laugh about it now."

Thompson one-upped Casalegno's birthday surprise to mark his 18th trip around the sun. Casalegno expressed his gratitude for his girlfriend's thoughtfulness on his Instagram post, writing, "This beautiful girl right here planned my whole birthday and made it a secret❤️ She was there when I fell on my face roller skating through being a spy in Resistance. She made my birthday special, and there is no amount of thank you's I could give. I love her to the moon and back, and infinity and beyond! Thank you for making my Birthday special❤️."

For their first anniversary, Thompson shared a compilation video containing adorable footage of the two. "Happy 1 year to my love❤️ Thank you for making me feel like the luckiest girl on earth! You mean the world to me.. love you more than you will ever know🌹," she captioned the video.

Casalegno and Thompson were each other's dates for their prom night, of course. The couple looked glamourous as the model opted for a baby pink Christian Siriano gown while Casalegno looked dashing in a black tuxedo. Thompson shared the pictures on her Instagram with the caption, "Senior Prom 2k19💗 Unforgettable night with my best friend and love💗."

"Got to see this brilliant girl graduate! How is it she can rock a cap and gown too? Like what?!" wrote Casalegno on his Instagram page, accompanied by a picture of the couple on Thompson's graduation day.

Casalegno gave fans a peek into their romance with a highlight reel of their cutest moments on Instagram. To mark three years together as a couple, Casalegno wrote a beautiful message summing up his feelings for Thompson. "This is a little sneak peek of our incredible year together. It's our 3 technically 4 year anniversary.❤️ these are my favorite memories together! From fake prom to real, from a small Texas town to Paris, France! I love you to the moon and back! Even though you like to blow powdered sugar everywhere❤️😂🥰," he wrote.

Thompson also posted a video of the two enjoying the sunset at a beach, writing, "Happy 3 but basically 4 year anniversary to my best friend♥️ I wouldn't trade any moment with you for the world! I love you endlessly♥️."

Casalegno penned a lengthy message for Thompson's 21st birthday. "Oh my little Larsey, you are just the most magnificent human being/ girlfriend to ever walk this earth. I have said and will continue to say this, you are beautiful from the inside all the way out," he wrote, continuing, "The amount of grace you walk with every single day is absolutely insane. Your walk in faith has continued to inspire me every single day. You help me be the best man I can be, whether that be in my faith, or how I love. You are a miracle. You are such a blessing in my life. You are my rock. You are my biggest fan, and I am yours. 20 years of your amazing life, and I'm sad that I've only got to experience 5 of it. You are a gift to this world darling❤️ Happy birthday sweet heart❤️."

Casalegno and Thompson spent Christmas together in snow-covered Montana, and they made "the best memories."

Casalegno and Thompson landed in Santorini, Greece, for a serene getaway. Both shared numerous pictures from the vacation, which was seemingly spent soaking up the sun while looking smitten with one another.