Pregnant actress Julia Roberts is reportedly furious Catherine Zeta Jones has been given top billing on the posters for the forthcoming Ocean's Twelve movie.

While Roberts played Tess Ocean in the 2001 Ocean's Eleven, Welsh beauty Zeta Jones is a new addition to the film series as Brad Pitt's onscreen love interest Isabel Lahiri in the sequel reports IMDb.com.

The Pretty Woman star, who is expecting twins in January, was horrified to see Zeta Jones given fourth place on the poster after George Clooney, Brad Pitt and Matt Damon, while Roberts languishes at the bottom underneath Andy Garcia, Don Cheadle and Bernie Mac.

A film source said: "Julia's not happy. She was in the original Ocean's film - Catherine wasn't - and she assumed her name would be first. It might sound petty, but being top means a lot in Hollywood. It means you are the biggest star. Julia and Catherine get on well on a personal level - but this is business."

Source: Press Release