Washington DC, July 14 -- Actress Carey Mulligan, who is known for her role in 'Beef ', has joined the cast of 'The Bell Jar' which also stars Billie Eilish in the lead role, reported Variety.

While the studio has not formally announced the project, sources told Variety that Mulligan will play Mrs Greenwood, mother to Eilish's protagonist Esther Greenwood in the adaptation of the famed Sylvia Plath novel.

Sarah Polley will direct the film. Plan B, Studiocanal and Joy Coalition are producing the project, which is also rumored to include 'Heated Rivalry' star Connor Storrie in its ensemble.

According to the outlet, Mulligan is a three-time Oscar nominee for her acclaimed work in the films "An Education," "Promising Young Woman" and Bradl...