The Hollywood couple Wednesday asked the Los Angeles Superior Court for a private arbiter to handle their divorce and a rep for Richards told People magazine: "Denise is moving forward with divorce proceedings."
Sheen's rep had no comment.
The couple announced their split last spring while Richards was seven months pregnant with their second child. In filing for divorce, she cited "irreconcilable differences."
After their daughter was born in June, they started going out together again and Sheen told countless interviews he was optimistic things were going to work out.
Sources also told People Richards "never wanted to get divorced" and had hoped "they could save their marriage."