The actor has confirmed an impending wedding while also responding to a barrage of reports about him and Walsh, including that he's pushing for a quick divorce from his wife, Camille Grammer, 42, so that he can marry Walsh, 29, as soon as possible.
"Kayte and I are marrying because we are engaged, and we are engaged because we are in love and see no reason to postpone our happiness any longer," the actor tells PEOPLE exclusively.
Grammer does not say when the nuptials will happen, but adds: "We are planning something we wish to be a private affair among several of our friends. Anything else is conjecture and false. Kayte and I are the only reliable source for this story. End of story."
Grammer has two kids with Camille, daughter Mason, 8, and Jude, 6. He also has two older daughters, Spencer, 27, and Greer, 18, from previous relationships.