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."

Former Cheers co-stars Kelsey Grammer and Ted Danson recently made headlines when they publicly mended their friendship after almost 30 years of not being on speaking terms. Now, Grammer has finally shared some details about what led to their argument, noting he was at a difficult point in his life at that time.