Camille Grammer is engaged to boyfriend David C. Meyer.
Grammer had hinted at the news Sunday, writing, "Party night with my love. We have a secret.. guess."
She appeared to be wearing her engagement ring in a photo Saturday while in costume for a Halloween party.
"Seventies disco glam. Saturday Night Fever or 'Yacht Rock' on Sirius," the star wrote on Instagram. "'Just when you thought it couldn't get more smooth, it got more smoother.'"
"I always thought that once I got married it was forever. My ex didn't think that," Grammer said of Kelsey at the Family Equality Council's 2017 Impact Awards in March.
"I should've realized that when I was number three."
Camille and Kelsey Grammer share 16-year-old daughter Mason and 13-year-old son Jude.
Camille Grammer is known for starring in the first two seasons of "The Real Housewives of Beverly Hills," and returned as a guest in Seasons 5 through 7.