Fellini's Casanova (Italian: Il Casanova di Federico Fellini, lit. 'The Casanova by Federico Fellini') is a 1976 Italian film directed by Federico Fellini from a screenplay he co-wrote with Bernardino Zapponi, adapted from the autobiography of 18th-century Venetian adventurer and writer Giacomo Casanova, played by Donald Sutherland. The film depicts Casanova's life as a journey into sexual abandonment, and his relationship with the "love of his life" Henriette (played by Tina Aumont). The narrative presents Casanova's adventures in a detached, methodical fashion, as the respect for which he yearns is constantly undermined by his more basic urges.

Shot entirely at the Cinecittà studios in Rome, the film won an Academy Award for Best Costume Design, with the Oscar going to Danilo Donati. Fellini and his co-writer Bernardino Zapponi were nominated for a Best Adapted Screenplay Oscar. The film also won BAFTA Awards for Best Costume Design and Best Production Design, and a David di Donatello for Best Score.