Demonlover is a 2002 French neo-noir thriller film written and directed by Olivier Assayas, and starring Connie Nielsen, Charles Berling, Chloë Sevigny, and Gina Gershon. The plot focuses on the entanglement between various corporations vying for the financial control of an interactive 3-D hentai company, resulting in a power struggle that culminates in violence and espionage.

It features a musical score by Sonic Youth. It premiered at the 2002 Cannes Film Festival, although it was more widely released several months later.

The film contains various themes, including desensitization to violence and the problematic nature of globalization. The film was distributed in the United States by Palm Pictures, who released it theatrically in its original unrated version. Palm Pictures released it on DVD in 2004 in both R-rated and unrated director's cut versions.

The film is primarily in French, with some scenes in English and Japanese. It is considered an example of New French Extremity by some journalists. In recent years the film has gained a cult following.