Sergio Donati (13 April 1933 – 13 August 2024) was an Italian screenwriter.

He started as a writer and had some of his books optioned for film.

He is well known for his collaboration with Italian director Sergio Leone, who encouraged him to take up screenwriting as a full-time career, and with Italian producer Dino de Laurentis.

In the first act, you hang a man up in a tree.

If he is dead, it is a drama.Donati died in Mentana on 13 August 2024, at the age of 91.