"When you are with your best friend, everything changes," the actress-singer exclusively tells PEOPLE at the 'Joker: Folie à Deux' Los Angeles premiere Karwai Tang/WireImage says everything has changed since meeting fiancé . At the Monday, Sept. 30, Los Angeles premiere of her upcoming film , the Grammy winner, 38, exclusively tells PEOPLE what it’s been like to collaborate with her fiancé on her latest studio album, — which also serves as a companion album to the upcoming film.

Polanksy, 41, worked as a co-executive producer on the project with Gaga. “It's just the first time that we decided to fully just go into it and do it. It just felt right,” she exclusively tells PEOPLE of their collaboration.

“We were both so excited,” she adds. “We were all warmed up and ready to go.” Gaga also tells PEOPLE how much she adores Polansky.

“I just love my fiancé so much," she says. "He's my best friend. He's my partner, and I just feel like when you are with your best friend, everything changes.

” The pair were first linked in 2020, when they were photographed kissing at a New Year’s Eve party in Las Vegas. They made their relationship Instagram official at the 2020 Super Bowl in Miami. In July 2024, Gaga revealed to French Prime Minister at the that .

Monica Schipper/Getty Polansky is credited as Gaga’s co-writer on songs featured on including, "Good Morning," "Get Happy," "Oh, When the Saints" and "If My Friends Could See Me Now." The songs to which he c.