The couple have committed to raising their four-year-old daughter together and "remain civil to each other to ensure that as parents we give our daughter the love and care she needs".
The actor went on to thank his new partner, Chantal, and his family for their support during the "very challenging separation".
Last year the star opened up about the decline of his marriage in an interview with Drum, admitting that he cheated on his wife.
"I got to a point where I just felt like if I'm not going to be trusted, why be trustworthy then? That was a big mistake on my part. I started to mess around a bit and it really didn't help the relationship," he said, adding that it grew worse over time, eventually leading to heated arguments.
Masha said he was committed to learning from his mistakes in order to become a better partner and parent.