Credit: Gabe Ginsberg/WireImage

Margot Robbie is in talks to costar in Goodbye Christopher Robin, EW has learned.

The Suicide Squad and Wolf of Wall Street star would join Domhnall Gleeson in the Simon Curtis-directed feature, a biopic about Winnie the Pooh creator A.A. Milne. Gleeson (Ex Machina, The Revenant) is set to play Milne, and Robbie is circling the role of his wife, Daphne.

The relationship between Milne and his son Robin, who served as inspiration for the character Christopher Robin in the Winnie the Pooh stories, will serve as the narrative thrust for the film, written by Simon Vaughan (executive producer of 2016’s War & Peace).

Robbie will be starring as Harley Quinn in Suicide Squad from DC Entertainment and Warner Bros., out August 5. A spin-off film centering on the character is also in the works.

Variety first reported the talks.