7/17-- According to the docs, Eli lists the couple's date of separation as July 12 of this year. He's willing to pay Lorenza spousal support.

Eli Roth and his wife are calling it quits on their marriage ... the "Hostel" director just filed for divorce.

Roth submitted docs in L.A. Monday -- obtained by TMZ -- to end things with Lorenza Izzo. The two got hitched back in 2014 and never had any children together. Izzo is a Chilean model and horror film actress, best known for co-starring with Keanu Reeves in "Knock Knock."

She's also in the upcoming, "The House with a Clock in Its Walls" ... which Eli directed. Of course, he's also known for his horror flicks and co-starring in Quentin Tarantino's "Inglourious Basterds."

It's unclear exactly what led to Roth's filing.

Roth posted about the split Monday evening, saying, "It is with deep love and respect that we are choosing to separate as a couple. We've had an incredible journey together, we love each other very much, and will remain the best of friends."