Andrea Riseborough is reportedly "in final negotiations" to star in Birdman.
The WE actress is the latest addition to Alejandro Gonzalez Inarritu's dark comedy, reported Deadline.
Batman star Michael Keaton is already on board to play a once-famous actor trying to get back into the limelight by directing a Broadway play, with a star-studded ensemble that also includes Naomi Watts, Edward Norton, Emma Stone and Zach Galifianakis.
Andrea, who has starred in Made In Dagenham, Never Let Me Go and Shadow Dancer, will next star opposite James McAvoy in Eran Creevy's stylish thriller Welcome To The Punch.
She will also star opposite Tom Cruise in Oblivion.