Double The Madness In First 'Joker: Folie À Deux' Trailer

First trailer of Todd Phillips's Joker sequel, Joker: Folie À Deux, is now released and we can finally see Joaquin Phoenix's Arthur Fleck (Joker) returning with new-comer Lady Gaga's Harley Quinn. In this trailer, the two meet up in the Arkham Asylum and bring together explosive chemistry to the world. Joker: Folie À Deux opens on October 3 in Hong Kong and October 2 in Taiwan.