The "Secret Diary of a Call Girl" actress is keen to make the move from TV to movies, and says starring alongside the US comedian would be a dream start to her Hollywood career.

She said: "I'd love to be in a Will Ferrell movie - that would be so much fun!"

Billie - who is expecting her first child with husband Laurence Fox - is considering reprising her role as prostitute Belle du Jour for a third series of the hugely popular show.

She said: "My ambitions have all changed recently. We are talking about doing a third series of 'Secret Diary of a Call Girl' next year but it's early days. You don't know whether you want to commit to anything because I don't really know what is going to happen to me or the baby."

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