Warner Bros. has debuted a teaser trailer for ‘Joker’ sequel ‘Joker: Folie à Deux’.

Joaquin Phoenix returns as Arthur Fleck here in a story that will reportedly unfold almost entirely within Gotham City’s Arkham Asylum and will have musical elements.

Directed by Todd Phillips, the film stars Joaquin Phoenix and Lady Gaga, Zazie Beetz, Catherine Keener, Brendan Gleeson, and Jacob Lofland co-star.

Phillips has co-written the script with ‘Joker’ co-writer Scott Silver.

Phoenix earned the best actor Oscar for the role of Arthur Fleck, a troubled man who evolves into a folk villain-type figure by the end of the story. ‘Joker’ earned $1.07 billion globally.

Also in trailers – Scarlett Johansson & Channing Tatum star in trailer for ‘Fly Me to the Moon’

The movie hits cinemas on October 4th.