Astrid Berges-Frisbey

Jack Sparrow and the little mermaid?

The fourth Pirates of the Caribbean installment has found one of its leading ladies — a fish-tailed beauty — in French actress Astrid Berges-Frisbey, Walt Disney Pictures announced.

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Berges-Frisbey will play Syrena, a "beautiful and alluring young mermaid" who befriends Johnny Depp's Jack Sparrow, according to Disney. The 23-year-old up-and-comer has appeared in such French films as La Fille du Puisatier, Bruc, Extase and La Premiere Etoile. Pirates of the Caribbean: On Stranger Tides will mark Berges-Frisbey's U.S. film debut.

The upcoming sequel also stars Ian McShane as Blackbeard and Penelope Cruz as Blackbeard's daughter.

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Geoffrey Rush will reprise his role as Barbossa, but Orlando Bloom and Keira Knightley will not return.

Slated to open May 20, 2011, Pirates of the Caribbean: On Stranger Tides starts production in June in Hawaii, Great Britain and Los Angeles.