Selena Gomez’s 31st birthday was on Saturday, and to celebrate, Nicola Peltz Beckham, who calls Gomez her “soul sister,” posted a beautiful picture on Instagram. In the picture, Peltz Beckham’s husband, Brooklyn Beckham, and Gomez are lying on either side of her.

“Happy birthday to my soul sister @selenagomez,” Peltz Beckham wrote in the post’s description. “I love you more than you know.”

She went on, “I am so blessed to have you by my side in this life thank you for being such a beautiful light in this world. I hope your day is so perfect and all your wishes come true.”

Gomez also posted a different version of the photo along with other photos of herself, Peltz Beckham, and Brooklyn Beckham having drinks and getting ready for New Year’s Eve in a fancy room.

“Fine calls us a throuple,” the founder of Rare Beauty wrote in the captions of the pictures at the time, calling herself a “forever plus one” in a hashtag.

Peltz replied, “Facts,” and then added a heart and a laugh emoji.

Peltz Beckham said back in May that she thinks the reason they are such good friends is because they speak the same love language.

“I think we speak the same love language,” she said. “We never really go out in L.A. We’re always working or with the dogs. The best moments are just like when you don’t have to do anything. You can just be with the people you love, and it makes me so happy, but I’m also such a homebody.”