The American actress, 57, has enjoyed a 40-year career in the industry and is known for iconic roles including Dana Scully in The X-Files and Jean Milburn in Sex Education.
The Dead to Me actress, 54, claimed she once confronted the Miramax co-founder, who is currently serving a 16-year prison sentence for rape, at a Hollywood party.
Demi, 63, was among the Hollywood stars who attended the Actor Awards in Los Angeles , California , on March 1, while Monica, 61, made her way to the BAFTAs in London last month.
Big names like Novak Djokovic and his wife Jelena, Hollywood star Eiza Gonzalez and men's tennis star Ben Shelton posted their congratulations after the happy reveal.