Both men had spent Monday night at a Paris police station after being summoned for questioning that morning, and have denied all charges.
alleged abuse of much younger actors, including in the 1980s and in several instances when they were underage, comes amid claims by activists that French cinema has too long provided cover for abuse.
Investigators opened a probe after actor and director Judith Godreche, 52, earlier this year officially accused Jacquot of rape during a relationship with him that started when she was 14 and he was 25 years her senior.
Isild Le Besco, 41, has filed a complaint over rape during a relationship with Jacquot that also started when she was underage, and Julia Roy, 34, has accused him of sexual assault.
Le Besco has also claimed
over sexual assault during a film shoot when she was 15.
Several other actors have since come forward with similar allegations, according to france24.
Doillon made advances during work sessions, while Anna Mouglalis, 46, alleged the filmmaker forcefully kissed her in 2011.