
Peter Sydney Ernest Lawford (né Aylen; 7 September 1923 – 24 December 1984) was an English-American actor.
He was a member of the "Rat Pack" and the brother-in-law of U.S. president John F. Kennedy and senators Robert F. Kennedy and Edward Kennedy. From the 1940s to the 1960s, he was a well-known celebrity and starred in a number of highly acclaimed films. In later years, he was noted more for his off-screen activities as a celebrity than for his acting; it was said that he became "famous for being famous".
Description above from the Wikipedia article Peter Lawford, licensed under CC-BY-SA, full list of contributors on Wikipedia

The Longest Day
1962 · as Lord Lovat

Ocean's Eleven
1960 · as Jimmy Foster

Little Women
1949 · as Theodore "Laurie" Laurence

Exodus
1960 · as Maj. Caldwell

The Picture of Dorian Gray
1945 · as David Stone

The April Fools
1969 · as Ted Gunther

The Oscar
1966 · as Steve Marks

Fantasy Island
1977 · as Grant Baines

Sahara
1943 · as British Soldier (uncredited)

That's Entertainment!
1974 · as Self - Host / Narrator

Mrs. Miniver
1942 · as Pilot (uncredited)

Easter Parade
1948 · as Jonathan Harrow III

Thunder Birds
1942 · as English Cadet (uncredited)

Advise & Consent
1962 · as Senator Lafe Smith

Never So Few
1959 · as Capt. Grey Travis, Doctor

Kangaroo
1952 · as Richard Connor

Royal Wedding
1951 · as John Brindale

Flesh and Fantasy
1943 · as Pierrot (uncredited)