Peter George Wellesley Graves, 8th Baron Graves (21 October 1911 – 6 June 1994), was an English actor.
Born in London, Graves was the son of Henry Algernon Claude Graves, 7th Baron Graves. Admiral Thomas Graves, 1st Baron Graves, was his great-great-great-grandfather. He was educated at Harrow.
Known during his acting career as Peter Graves, he specialised in light comedies and musicals, often cast as dapper young men about town. His career peaked in the mid to late 1940s, beginning with the films of director/writer Val Guest, including Miss London Ltd (1943) and Bees in Paradise (1944), opposite Arthur Askey; and Give Us the Moon (1944) and I'll Be Your Sweetheart (1945), opposite Margaret Lockwood. Other roles included the lead in Spring Song (1946), and George IV in both The Laughing Lady (1946) and Mrs. Fitzherbert (1947).
He also appeared in a number of films by Herbert Wilcox, such as popular musicals Spring in Park Lane (1948) and Maytime in Mayfair (1949), both vehicles for Anna Neagle and Michael Wilding. He also portrayed another royal, Prince Albert in Wilcox's The Lady with a Lamp (1951) and Lilacs in the Spring (1954).
He re-emerged in the 1960s as a popular comic supporting player in number of films, including Alfie (1966); The Wrong Box (1966); The Jokers (1967); I'll Never Forget What's'isname (1967); and The Magic Christian (1969). He continued acting until a few years before his death, mostly on television.