Mena Suvari -- I'm Calling a TRUCE in My Divorce

Mena Suvari's divorce war is over ... the actress has reached a settlement with her ex ... and she won't have to spend one dime on the guy ever again.

TMZ broke the story ... Mena's husband Simone Sestito was demanding $17k per month in spousal support ... claiming Mena makes a FORTUNE and he got used to living the good life.

But Mena's rep tells TMZ the two talked things out in private and were able to bury the hatchet -- "They have amicably resolved their financial differences outside of Mediation and Court."

The rep says, "Neither party will pay the other any support."