Friendship Goals! Taylor Swift Gushes Over Ed Sheeran in Sweetest Instagram Post Ever

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It's no secret that Taylor Swift and Ed Sheeran are close pals, but Swift let the world know just how much their friendship means to her in a super sweet Instagram post she dedicated to the British crooner on his 25th birthday on Wednesday.

Swift recalls Sheeran playing her his GRAMMY-winning hit, "Thinking Out Loud," at a ballet shop for the first time shortly after he wrote it, and calls it one of the "highlights" of her life.

"He walks in and says, 'You have to hear this new song. I think it's the best one I've ever written,'" the "Out of the Woods" singer shares. "And then, as usual, he pulls out his phone and gives me headphones. I sat there on a bench in that store and heard 'Thinking Out Loud' for the first time, as little kids were picking out tutus and leotards next to us. Little did we know it would go on to be first dance song at countless weddings all over the world, become Ed's biggest hit, and eventually go on to win him Song of the Year at the 2016 GRAMMYs."

WATCH: Ed Sheeran's Career Goals -- I Want to Catch Up With Taylor Swift

The two music superstars have been close ever since Sheeran opened up for Swift on her Red Tour, and performed a duet together on 2013's "Everything Has Changed."

"I lived for the moments he would burst into my dressing room with a new song to play me," Swift writes. "It happened so often that it became normal, and I don't think he ever knew how much it meant to me that he wanted me to hear his songs first. I don't think he ever knew how inspired I was by his drive and passion to constantly create new art. But it's his 25th birthday today, so I'm saying it now."

"You deserve everything you have, and everything you will continue to achieve, Ed," she concludes.

WATCH: Ed Sheeran and Selena Gomez Enjoy a Night Out Together, But Was It a Date?

Last May, Sheeran hilariously revealed why he would never hook up with Swift -- although he has adorably third-wheeled her and her beau, Calvin Harris!

"Too tall," he joked to New York's Power 105.1 radio show The Breakfast Club. "I feel like we look like cast members of The Hobbit."

Watch below!