Filmmaker Todd Phillips has shared a teaser image from `Joker: Folie a Deux`, announcing "day one" of work on the Joaquin Phoenix starrer. Taking to Instagram on Sunday, Phillips posted an image of Joaquin in character as the movie`s protagonist Arthur Fleck.

The picture shows Joaquin giving a dead-eyed look as he’s receiving a shave from what appears to be an orderly at the facility. The director captioned the picture on Instagram and wrote, “Day 1. Our boy. #joker."

Though the plot details remain closely guarded, the `Joker` sequel will pick up with Phoenix`s killer clown after he`s been admitted to Arkham Asylum. Joaquin will be joined by Lady Gaga for the sequel, who has been cast in a role reported to be a take on the DC Comics villain Harley Quinn.

For the unversed, the 2019 film was both a critical and commercial success, with a worldwide gross of over $1 billion at the box office, making it the highest-grossing R-rated film of all time. It received recognition from multiple major award-giving bodies, including two Oscars and two Golden Globes, both for Best Actor and Best Original Sound.