Australian model-turned-actress Gemma Ward has signed on for a role in the latest Pirates of the Caribbean movie. The newest instalment in the blockbuster franchise starts filming in Hawaii this week. Orlando Bloom and Keira Knightley have jumped ship this time around, but Johnny Depp, Penelope Cruz and Geoffrey Rush are still on board. Gemma will play a mermaid and has a small speaking part. She doesn’t shoot her scenes until August, but she’s spent the last year studying acting full-time in New York. Pirates of the Caribbean: On Stranger Tides is scheduled to be released next May in time for the US Summer blockbuster season.