With Joker: Folie à Deux out in cinemas this week, these are the most trendy costumes of the season. Here where you can buy Joker and Harley Quinn costumes.

Take a look at our specially-curated list of the 7 best Harley Quinn costumes and accessories to channel your inner Harley for your next cosplay.

DC's "Burtonverse" iteration of Harley Quinn is back with a new costume that would make Jack Nicholson's Joker from Batman '89 blush with envy.

In back-to-back films, costume designer and three-time Oscar nominee Arianne Phillips designed the far-ranging wardrobes for Joker and Harley Quinn as a song-and-dance duo in “Joker: Folie à ...

Set photos from "Joker: Folie à Deux" unveil Lady Gaga's make-up and costume for the role of Harley Quinn.

Joaquin Phoenix’s Joker is going to have some criminal company for “Folie à Deux,” with Lady Gaga joining the sequel for a role reported to be a spin on the Batman villain Harley Quinn.

Lady Gaga appeared in full makeup and costume in character as Harley Quinn while filming the upcoming sequel "Joker: Folie à Deux" at Manhattan's City Hall.

Ironically, when Arthur is ready to completely shed the Joker persona, Lee disappears into Harley Quinn with her final costume, a red diamond-patterned jacket that’s more sophisticated and ...

In back-to-back films, costume designer and three-time Oscar nominee Arianne Phillips designed the far-ranging wardrobes for Joker and Harley Quinn as a song-and-dance duo in “Joker: Folie à ...