Every day is Another Cinderella Story for Selena Gomez with Benny Blanco by her side.

The Rare Beauty founder, 32, looked like a modern-day princess as she celebrated her fiancé, who marked his 37th birthday on Saturday, March 8.

On Monday, March 10, Gomez’s friend and former assistant, Theresa Mingus, posted Instagram photos from a party celebrating Blanco’s special day.

In the pictures, Gomez could be seen posing with Mingus and Anna Collins in a strapless, hot pink ball gown and black furry coat in front of a backdrop filled with silver and blue balloons.

Gomez’s look, equipped with a puffy skirt and form-fitting bodice, is a $10,990 design from Oscar De La Renta, per Page Six. The dress was paired with a string choker and a pink lip.

In the comment section, fans were enchanted by the Only Murders in the Building star’s style choice.

“Queen of the entire world @selenagomez ❤️,” one commenter wrote. “Selly in prom dress giving princess ✨️💕,” shared another Instagram user.

While Blanco wasn’t seen in the pictures, Gomez made sure he felt loved on his birthday by penning a sweet tribute in his honor.

“I’m not sure what I did to deserve you but damn am I glad you were born.. happy birthday baby ♥️,” Gomez wrote next to an Instagram carousel filled with romantic photos of the two. Later this month, the couple will release their first joint album.

Coming out Friday, March 21, I Said I Love You First is set to give “fans a unique window into their relationship,” per a press release shared with PEOPLE.

“This album came together organically as a direct result of the comfort that they both felt when working together creatively, allowing them to produce art that authentically reflects their experiences,” the press release adds. “It chronicles their entire story—before they met, falling in love and looking to what the future holds.”

The joint project includes songs like “Scared of Loving You,” “Call Me When You Break Up,” featuring Gracie Abrams, and “Sunset Blvd,” which will be released on Friday, March 14.

Gomez and Blanco’s album collaboration comes months after the couple announced their engagement on Instagram in December 2024.