One of television’s favorite sitcom stars secretly got engaged, RumorFix has confirmed.

RadarOnline was first to report that Frasier’s Kelsey Grammer is engaged to girlfriend Kayte Walsh.

His publicist, Stan Rosenfield, tells RumorFix, “They are engaged and are very happy.”

The cat was let out of the bag this weekend after Kayte was spotted wearing a huge diamond engagement ring at a train terminal in Washington, D.C.

Rosenfield says, “They have been engaged for a while, but never announced it publicly.”

Kelsey’s estranged wife, Camille,  filed for divorce in July, but it’s not final yet. Camille is one of the stars of the Real Housewives of Beverly Hills.