Sienna Miller joins A Case of You

February 17th, 2012

Sienna Miller has joined the cast of 'A Case Of You'.

The 30-year-old actress - who is expecting her first child with fiance Tom Sturridge in June - and Brendan Fraser have been added to the line-up of the romantic comedy, which has started filming in New York.

Justin Long will also star in the film - which Evan Rachel Wood, Vince Vaughn and Peter Dinklage are attached to - and he has co-written the script alongside his younger brother Christian and Keir O'Donnell, Variety reports.

The movie tells the story of a young writer who impresses a girl by making up an online profile, but he is forced to try to keep up the act when she falls in love with him.

One of Sienna's last starring roles was in 2009 action film 'G.I. Joe: The Rise of Cobra' - which saw her play Ana Lewis - but the blonde beauty has ruled out of being in a sequel to the motion picture because she thinks it made her ''comprise'' herself.

She previously explained: ''I think I compromised myself with that movie. It wasn't the kind of film I would like to see and it sort of made me evaluate why I'm doing this.

''I realised that unless it was a film I really loved, I didn't want to be away working. Because I'm getting to the stage where I want to work to live, not live to work, if you see what I mean. I don't want to a film that I wouldn't even go to see.''