Margot Robbie is in negotiations to play Queen Elizabeth in Focus Features and Working Title’s “Mary Queen of Scots,” opposite Saoirse Ronan.

Josie Rourke is directing the film. Working Title’s Tim Bevan, Eric Fellner and Deborah Hayward are producing.

“House of Cards” creator Beau Willimon is writing an original script based on a book by John Guy titled “The True Life of Mary Stuart.” “Mary” has yet to be greenlit, but sources say things are headed in the right direction. If greenlit, the film would likely go sometime later this year. Ronan will play the title role of Mary.

Following the success of big hits like “Suicide Squad” and “The Wolf of Wall Street,” this latest role gives the Australian-born Robbie a prestige part to add to her portfolio. It could also have awards season potential given Focus’ track record of pushing Oscar campaigns for its releases.

Robbie, 26, is currently starring in Fox Searchlight’s “Goodbye Christopher Robin,” where she plays the wife of “Winnie the Pooh” author A.A. Milne. She recently wrapped production on “I, Tonya” starring as the title character Tonya Harding in a film she also produced under her Lucky Chap Entertainment banner.

She is repped by Management 360, CAA, Aran Michael Management and attorney Jeff Bernstein.