Fellini: I'm a Born Liar (French: Fellini, je suis un grand menteur) is a 2002 French documentary film written and directed by Damian Pettigrew. Based on Federico Fellini's last confessions filmed by Pettigrew in Rome in 1991 and 1992 (Fellini died in 1993), the film eschews straightforward biography to highlight the Italian director's unorthodox working methods, conscience, and philosophy.

A masterclass in cinema aesthetics, the feature documentary uses excerpts and behind-the-scenes from 8½, Juliet of the Spirits, Histoires extraordinaires, Fellini Satyricon, Amarcord, Fellini's Casanova, And the Ship Sails On, and City of Women. Also interviewed are Roberto Benigni (La voce della luna), Terence Stamp (Histoires extraordinaires), and Donald Sutherland (Casanova), among other notable Fellini collaborators.

The film was nominated for Best Documentary at the European Film Awards, Europe's equivalent of the Oscars.