He's a proud boyfriend. Calvin Harris publicly congratulated his girlfriend, Taylor Swift, on her Album of the Year win at the 2016 Grammy Awards, posting a sweet message about the pop superstar on Tuesday, February 16.

The EDM DJ and producer, 32, uploaded a pic of Swift, 26, accepting her second Album of the Year award via his popular Twitter and Instagram accounts. "Congratulations to my beautiful girlfriend," Harris captioned the photo.

Though Harris didn't accompany Swift to the Staples Center in L.A. earlier that night (Selena Gomez was her date), he later joined the pop songstress at Republic Records' afterparty at Hyde Sunset Kitchen + Cocktails. Inside the bash, he posted a photo to Snapchat of Swift giving him the sweetest smooch on the cheek.

A source at the party tells Us that Harris couldn't keep his hands off Swift inside the VIP section. "Taylor pulled up with 20 people, a huge squad, including Haim and Lorde," the observer tells Us. "They were very much a couple inside VIP."

Swift collected three trophies on Monday night and memorably took on Kanye West in the final moments of the live telecast. 

"I want to say to all the young women out there — there are going to be people along the way who are going to try to undercut your success or take credit for your accomplishments or your fame," Swift said at the podium. "But if you just focus on the work and you don't let those people sidetrack you, someday when you get where you're going, you'll look around and you will know that it was you and the people who love you who put you there. And that will be the greatest feeling in the world."

Us Weekly broke the news that Swift and Harris were an item last April. In a July 2015 interview with HITS Radio, Harris gushed about the superstar.

"It's boxes I didn't even know existed, she ticks," he said of Swift's impressive talents. "It's really ridiculous.... She's generally an incredible cook and human being."

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