The Marvel Cinematic Universe has earned a reputation for major cameos, so when "The Guardians of the Galaxy Holiday Special" dropped on Disney+ this week, it's no surprise that some eagle-eyed fans thought they spotted someone famous. The special, which follows Drax (Dave Bautista) and Mantis (Pom Klementieff) on their quest to find Star Lord (Chris Pratt) the perfect Christmas present, ended with a surprise musical performance from a special guest. But before the revelry gets started, a cheerfully decorated man who bears a striking resemblance to Mark Hamill can be seen taking a swig from the bottle.

But the actor's son has officially confirmed that Hamill did not make an appearance. Nathan Hamill has now tweeted a picture of the man in question, along with the caption, "That's not @MarkHamill #GuardiansoftheGalaxyHolidaySpecial." Further, a Twitter user named Cynn Smith -- who was himself a background performer in the holiday special...