Director Alejandro González Iñárritu has brought on Michael Keaton, Emma Stone, Naomi Watts, and Zach Galifianakis to star in his first comedy, Birdman. We first reported on this project back in December.

The story follows an aging actor who once played a famous superhero, trying to mount a comeback on Broadway. Michael Keaton, who starred in 1989's Batman and 1992's Batman Returns, will play the actor trying to get back on top. Emma Stone is portraying Michael Keaton's daughter and his new assistant, fresh off her stint in rehab. Naomi Watts and Zach Galifianakis are playing an actress and producer, respectively.

Our story from December revealed that the story will take place all in one location over the span of three days, as he tries to juggle his comeback attempt with his family life. Other parts that still need to be cast are the play's main lead and the actor's ex-wife.

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Alejandro González Iñárritu is directing from a screenplay he co-wrote with Alexander Dinelaris and Biutiful writers Armando Bo and Nicolás Giacobone. Production is scheduled to begin in early April.