Depp joined by mermaid on Pirates 4
Johnny Depp will be joined in Pirates of The Caribbean 4 by a mermaid.
Young French actress Astrid Berges-Frisbey has been cast as ocean beauty Syrena by director Rob Marshall, in her first English-speaking role, Heat Vision Blog reports.
Astrid's previous French films include family drama Un Barrage Contre Le Pacifique and the soon to be released Bruc.
She has also appeared onstage at the Theatre Marigny in a production of Peter Shaffer's Equus.
She will star alongside Penelope Cruz, Ian McShane, Geoffrey Rush, and Johnny as Captain Sparrow sets out on the hunt for the legendary fountain of youth.
The film is due to begin shooting in June in Hawaii, Los Angeles and Britain.
It is due out in cinemas in May 2011.