The former "Cheers" star told the New York Post his estrangement began when he was "going through a lot of self-doubt; self-loathing,” and "drinking a lot."

Kelsey Grammer recently explained to The New York Post why he and Cheers co-star Ted Danson didn’t speak for 30 years.

Two of the show’s stars, Kelsey Grammer and Ted Danson, infamously had a falling out that lasted over 30 years. Now, Grammer has opened up about their feud including what it was about and how they mended things.

Kelsey Grammer revealed some of the reasoning behind his three-decade falling out with "Cheers" co-star Ted Danson, telling the New York Post that the feud arose during a period he was drinking heavily.