Alain Delon

as Tom Ripley

Marie Laforêt

as Marge Duval

Maurice Ronet

as Philippe Greenleaf

Erno Crisa

as Inspector Riccordi

Frank Latimore

as O'Brien

Billy Kearns

as Freddy Miles

Ave Ninchi

as Signora Gianna

Viviane Chantel

as Belgian Lady

Nerio Bernardi

as Agency Director

Barbel Fanger

as Mr. Greenleaf

Lily Romanelli

as Housekeeper

Nicolas Petrov

as Boris

Elvira Popescu

as Mrs. Popova

Romy Schneider

as Freddy's Companion (uncredited)

Paul Müller

as Blind Man (uncredited)

René Clément

as Clumsy Waiter (uncredited)

Jacqueline Parey

as Ingrid (uncredited)

Leonello Zanchi

as Police Inspector (uncredited)

Walter Grant

as Purchaser of the Yacht (uncredited)

Nino Vingelli

as (uncredited)