The Oscar-winning singer stars opposite Joaquin Phoenix in the upcoming sequel as the disturbed lover of his titular Batman villain.

Lady Gaga discussed this subject while explaining how the movie inspired her new album Harlequin, which collects reimagined covers that she and Phoenix sing in Joker, as well as two original songs. The singer-songwriter and star of movies like A Star is Born and House of Gucci started off by telling EW:

Lady Gaga, whose real name is Stefani Joanne Angelina Germanotta, is set to portray one of pop culture’s most iconic characters, Harley Quinn.

The singer and actress, 38, looked nothing short of sensational in a figure-hugging black velvet dress as she let loose after walking the red carpet earlier that evening.

"When you are with your best friend, everything changes," the actress-singer exclusively tells PEOPLE at the 'Joker: Folie à Deux' Los Angeles premiere

Everything changed for Lady Gaga when she fell in love with fiancé Michael Polansky. The "Poker Face" songstress recently sat down with People to discuss the evolution of their relationship, detailing the moment the stars aligned and she was ready to "fully just go into it" and create a record with her beau.

Los Angeles premiere of Joker: Folie à Deux the singer could not stop gushing about her fiancé, tech entrepreneur Michael Polansky, with whom she collaborated on her just-released Joker companion album,