Which actor played John Robie in the 1955 Alfred Hitchcock film "To Catch a Thief"?

"To Catch a Thief" is a 1955 American romantic thriller film directed by Alfred Hitchcock, from a screenplay by John Michael Hayes based on the 1952 novel of the same name by David Dodge. The film stars Cary Grant as a retired cat burglar (John Robie) who has to save his reformed reputation by catching an impostor preying on wealthy tourists (including an oil-rich widow and her daughter played by Grace Kelly) on the French Riviera.

Cary Grant (born Archibald Alec Leach; January 18, 1904 – November 29, 1986) was an English and American actor. Known for his Mid-Atlantic accent, debonair demeanor, lighthearted approach to acting, and sense of comic timing, he was one of classic Hollywood's definitive leading men. He was nominated twice for the Academy Award, received an Academy Honorary Award in 1970, and received the Kennedy Center Honor in 1981. He was named the second greatest male star of the Golden Age of Hollywood by the American Film Institute in 1999.