Jack Griffo is celebrating a special day!

The 23-year-old actor took to Instagram to wish his new girlfriend Mia a “Happy Birthday.”

“Happy birthday Mia !! 😊🎂 You light up my life ☀️ You deserve all the love and positivity that you give so freely to people. I love you 💘,” he wrote, along with a few photos of them together.

Jack first showed off his new leading lady earlier this month.

“Uh, hey, Mia. Um, I miss you. Just so you know. Ya, I think that’s it … oh and u make me the happiest boy in space 😋👽🌎,” he captioned a set of photos of the couple in Joshua Tree.

In case you missed it over the summer, it was announced that Jack was among a group of young stars who were collaborating on a new quarantine thriller, Don’t Log Off. Find out who else is attached to the project!