Sin City beauty Dawson spent the day at three schools - New York University, St. John's University, and Lehman College - helping to prepare Big Apple residents for the upcoming election, while former That '70s Show star Valderrama joined the crusade and set up camp at Hofstra University to encourage students to turn out for the polls in November (12).
The actor also kicked off the day's celebrations during a morning rally in Times Square - in a post on Twitter.com, he wrote, "About to do a Press Conference in TimesSquare's SubwayStation in celebration of NationalVoterRegistrstionDay who's here?"
Ferrera, who recently relocated to the city, registered to vote and additionally offered to help sign up candidates at Columbia University, and now she is urging fans to follow her lead.
She tweeted, "Have 2 (to) re-register 2 vote cause I moved! Good thing it's National Voter Registration Day! Register with me".
Other celebrities helping out included actress Elizabeth Banks, and singers Mandy Moore, Dave Matthews and Marc Anthony.