Lady Gaga debuts her voice as Harley Quinn in an audio preview for "Joker: Folie à Deux."

Lady Gaga debuted her voice as Harley Quinn in an official audio preview for "Joker: Folie à Deux", offering a glimpse into her take on the DC character. The Grammy Award-winning artist channels a sensual and breathy version of the villainess as she coaxes Joaquin Phoenix's Joker to do as he pleases. The first trailer for the sequel will be released during CinemaCon next week.