Swift's longtime bestie Gigi Hadid took to her Instagram story to share a snuggly pic showing the pair laying together in pajamas and smiling for the camera.
"Happiest 31st year, my T! Wish we could be together to celebrate," Hadid wrote. "Love you so much."
Cara Delevingne also shared a throwback pic to the old days, when people could celebrate holidays together, from Swift's big 4th of July bash in Rhode Island in 2016.
"Happy birthday @taylorswift. You continue to inspire me and I'm so grateful for our friendship," the Carnival Row star captioned the photo of herself and Swift standing side-by-side and looking out across her backyard. "Cheers to you queen!"
Here's a look at how some of Swift's other superstar besties paid tribute to her on her birthday:
I have to send a special happy bday to the creator of our families soundtracks of 2020 @taylorswift13 Our daughter Tish asked me today to tweet you a happy bday. You have awakened an artist inside her and there is not greater gift you can give our family. Thank you!
I just love @taylorswift13 for committing to bringing so much magic to a time in which she knows so many of her fans may be suffering. This is the least profitable era of music we’ve lived to see and she’s working very hard because it makes people happy. That’s really somethin’
"Not to be all ‘iTs mY BiRtHdAY & I jUsT wAnNa DaNcE’ but... it is and I do. So we’ve released the willow dancing witch version, remixed by Elvira, a bad ass female producer I really respect 💪💃," Swift wrote on Instagram on Sunday.