Picture: Flower Films/People 

Toni Collette has gone bald to play a woman battling breast cancer in the new drama Miss You Already.

The Aussie actress has shaved off her long locks in preparation for the role and she showed off her drastic new look in behind-the-scenes photos taken on set in London.

In one of the snaps, published on People.com, a make-up free Collette smiles as she poses alongside Drew Barrymore, who plays her best friend in the film.

A second picture shows the Australian actress all dressed and ready for the shoot.

Miss You Already, about two childhood best friends battling major medical issues, is being directed by Twilight’s Catherine Hardwicke. AAP