Robin Williams was an unbelievably talented comedian -- and not half bad as a Denver Broncos cheerleader, either.
The late actor briefly joined the Broncos cheering squad in November 1979, donning a white sequined mini-skirt, go-go boots and an orange neckerchief, then prancing in front of a crowd that the Denver Post pegs at around 74,000 people.
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In doing so, Williams became the first male Broncos cheerleader in history, and likely the most entertaining Broncos cheerleader of all time, regardless of gender.
Williams pulled the stunt for the 37th episode of "Mork & Mindy," a comedy show set in nearby Boulder, Colorado, in which Williams plays Mork, an alien sent to investigate Earth. In the episode, Mork joins the squad at the urging of his adoptive sister's cousin, Nelson, who believes his political career will be aided by Mork's new gig.
Perhaps inspired by Williams' antics on the sidelines, the Broncos beat the Patriots 45-10.
Watch the full episode below, or an excerpt of Williams as a cheerleader, above.