Jon Hamm teaches Colorado how to vote early for Obama

Hamm gave instructions to vote either by mail or in person in front of a backdrop of "I voted" stickers. The minute-long Web video was released on YouTube by the campaign on Monday.

Hamm, along with fellow actors Jennifer Westfeldt, Laurence Fishburne and Stephanie March, spent time Monday in Grand Junction, Colo., campaigning for the president, manning phone banks and talking with volunteers at the Obama campaign office.

Both Obama and his GOP opponent, Mitt Romney, are encouraging swing-state residents to vote early as national polls continue to show tight margins ahead of Election Day.