B efore Kelsey Grammer starred as Dr. Frasier Crane on the aptly-titled Frasier for 11 seasons, he shined as the character for eight seasons on Cheers, with both those shows, as w

After more than a year of reconciling, the two former 'Cheers' costars finally reveal what started their 30-year feud.

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."