As the Oscar winner prepares to debut her Harley Quinn in 'Joker: Folie á Deux', Lady Gaga recently announced the companion album 'Harlequin'.

For those unfamiliar with the project the film picks up following the events of Joker and sees Arthur Fleck (Joaquin Phoenix) now institutionalized at Arkham awaiting trial for his various crimes. It's during this time that he meets the love of his life, Harley Quinn (Gaga), and with her, the music that's inside of him.

Harlequin” is a companion album for the film, in which Gaga stars as Lee, also better known as the unhinged villain Harley Quinn.

Lady Gaga stays in character on Harlequin. It’s her companion to Joker: Folie a Deux, inspired by her role as Harley Quinn. But it’s a luxuriant album of jazzy swing, mostly standards, right in her sweet spot.

Folie à Deux companion album Harlequin dropped on Friday (September 27), and it shot right to No. 1 on iTunes, becoming an instant bestseller.

Stefani Germanotta, better known as Lady Gaga, has been known for her musical prowess since the late 2000s. However, she is fast becoming just as acclaimed for her acting. Her next on-screen turn casts her opposite Joaquin Phoenix in Joker: Folie a Deux,

When Lady Gaga was first confirmed to play Harley Quinn in Joker 2, it was natural to have a lot of questions when its first teaser showed artwork of the Grammy winner and Joaquin Phoenix dancing to Frank Sinatra’s “Cheek to Cheek.

Lady Gaga finally unveiled the cover art for her latest LP, Harlequin, which she described as a "companion album" to the soundtrack for her upcoming Todd Phillips psychological musical thriller Joker: Folie à Deux.