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Each fan will wear one of the famous blankets with sleeves to the Cavs-Pistons game, set to tip off at 7 p.m. in Cleveland.
But these aren't just any Snuggies -- the Cavs are hooking fans up with free limited edition, Cavs-colored Snuggies to help set the record.
A Guinness World Records official will be on hand to certify the record, according to the NBA. A sellout crowd of 20, 562 is expected to make the Guinness attempt.
The game will be televised on ESPN -- so Snuggie fans who can't make the game can play along at home.