Morgan reunited with his former Saturday Night Live co-star Jimmy Fallon on Late Night on Wednesday (December 5) to give his comedic take on the classic holiday poem.
The 30 Rock actor used the poem to air his own personal grievances about the holiday season, such as complaining about sugar plums and a pesky mouse.
Morgan appeared on Late Night to promote 30 Rock's final season, which will wrap up in early 2013.
Fallon kicked off his festive celebrations earlier in the week when Mariah Carey performed her hit 'All I Want for Christmas' with school instruments.
Late Night with Jimmy Fallon airs at 12.35am ET weeknights on NBC.
Watch Mariah Carey perform with Jimmy Fallon below: