Oliva Wilde has joined the cast of Spike Jonze’s new film.

She will be joining Joaquin Phoenix, Rooney Mara, Samantha Morton and Amy Adams in the as-yet untitled movie.

The film reportedly is the story of a man who falls in love with the voice of a computer device.

Olivia confirmed on Twitter: "Very happy to have joined the funtastic world of Spike Jonze."

Spike has written the script for the new movie, which will be his first film since Where The Wild Things Are in 2009.

Olivia recently finished filming Ron Howard's Formula 1 racing drama Rush and The Incredible Burt Wonderstone with Jim Carrey.

Wilde is also set to star with Owen Wilson in upcoming indie comedy Squirrels To The Nuts.