László Vadnay (1904–1967), or Ladislaus Vadnai, was a Hungarian screenwriter. He worked in the United States for a number of years before returning to Hungary.

• Kiss Me, Darling (1932)
• Vica the Canoeist (1933)
• The Dream Car (1934)
• Everything for the Woman (1934)
• The Homely Girl (1935)
• Car of Dreams (1935)
• Villa for Sale (1935)
• Fräulein Lilli (1936)
• Sensation (1936)
• Salary, 200 a Month (1936)
• Sensation (1936)
• Hotel Springtime (1937)
• Tales of Budapest (1937)
• An Affair of Honour (1937)
• Josette (1938)
• Man Sometimes Errs (1938)
• Seven Sinners (1940)
• Flesh and Fantasy (1943)
• Uncertain Glory (1944)
• The Big Show-Off (1945)
• Copacabana (1947)
• No Time for Flowers (1952)
• I Love Melvin (1953)
• Ten Thousand Bedrooms (1957)
• It Happened in Athens (1962)
• Dime with a Halo (1963)

• McNulty, Thomas. Errol Flynn: The Life and Career. McFarland, 2004.

Uncle of Adam Carolla

• László Vadnay at IMDb