Mila Kunis joining Haggis movie

Mila Kunis is apparently joining the cast of upcoming ensemble drama Third Person.

The Black Swan star joins Liam Neeson and Olivia Wilde, who have already been cast in director Paul Haggis' movie, reports TheWrap.com.

Casey Affleck and James Franco - who Mila worked with on upcoming 3D fantasy adventure film Oz: The Great And Powerful - are also said to be in talks about taking parts in the movie, which will follow three relationships in three different cities.

So far it hasn't been revealed who Mila, 29, will be playing.

Principal photography on Third Person is expected to get under way in October.