New Template: Murder by Death; David Niven, Maggie Smith, Eileen Brennan

Murder by Death (1976) is a murder mystery spoof that didn't win any Oscars, but the cast includes Oscar winners:

David Niven (photo left) won in 1959 for Best Actor in a Leading Role: Separate Tables (1958)

Dame Maggie Smith (photo right) won twice: Best Actress in a Supporting Role: California Suite (1978) and Best Actress in a Leading Role: The Prime of Miss Jean Brodie (1969)

Eileen Brennan (photo bottom) was nominated once for Best Actress in a Supporting Role: Private Benjamin (1980)

TCM airs it every so often; I recommend it for fans of the movie 'Clue' which Eileen Brennan also stars in; learn more about it on IMDb: https://www.imdb.com/title/tt0074937/?ref_=ext_shr_lnk