The former Frasier star stormed off the Piers Morgan Tonight set at the last minute after spotting a snap of his ex-wife Camille in the opening titles, according to the show host - and now Grammer has joined Madonna on the ex-tabloid editor's banned list.
Asked if he'll have the actor back on the show, Morgan states, "No, it'll be the last time."
Grammer has yet to comment on the drama but his representative says, "Piers needs to take responsibility for what he did to Kelsey. It's called accountability."
Last month (Aug12), Grammer refused to utter Camille's name during a chat with Tv host Oprah Winfrey, simply referring to the reality Tv star as "that person".
The Grammers went through a bitter divorce and custody battle after splitting in 2010.