The couple met and began dating while Ebla was making his 2017 film The Mountain Between Us.
Rio cinema were quick to announce Idris and Sabrina's happy news on social media with their legion of loyal followers.
Ms Dhowre is an American model of Somali descent, and a former Miss Vancouver.
It comes less than a year after Idris said he would never get married again during an interview with ESSENCE magazine.
Intel drones stole the show at the Winter Olympics Opening Ceremony
This drone swarm kicked off a sequence of events where snowboarders wearing illuminated clothing as they carved up the mountain. The fleet is controlled by one computer and one pilot.
"Am I ever gonna get remarried?"
The SAG Award victor told People magazine that he fell in love with Dhowre while filming "The Mountain Between Us" in which he stars opposite Kate Winslet. I don't think so. Yeah, I don't think so. "Marriage is an institution of sorts".
He was married to Hanne "Kim" Norgaard from 1999 until 2003, and to Sonya Nicole Hanklin in 2006 for just six months.
He and Norgaard share a teenage daughter, Isan and he welcomed a son, Winston, with girlfriend Naiyana Garth in 2014.