Joel and Ethan Cohen equaled that accomplishment in 2007 when they shared the Oscar for directing No Country for Old Men.

No other film has had co-winners as Best Director, although
Films that were nominated as Best Picture with multiple credited directors include:

• The Adventures of Robin Hood (1938; Michael Curtiz and William Keighly)
• Pygmalion (1938; Anthony Asquith and Leslie Howard)
• Mister Roberts (1955; John Ford and Mervyn LeRoy)
• The Longest Day (1962; Ken Annakin, Andrew Marton, and Bernhard Wicki)
• How the West Was Won (1963; John Ford, Henry Hathaway, George Marshall, and Richard Thorpe)
• Heaven Can Wait (1978; Warren Beatty and Buck Henry)
• Little Miss Sunshine (2006; Jonathan Dayton and Valerie Faris)

Only Heaven Can Wait received a Best Director nomination to go with its Best Picture nod, losing both awards to The Deer Hunter..