Parker joined volunteers in calling undecided voters from the phone bank at the Obama New York City headquarters Thursday. A new U.S. president is to be elected Tuesday.
"She wanted to get involved anyway she could!" a campaign source told Usmagazine.com about Parker's involvement in the campaign. "She came and ended up staying until the end of her shift and made a ton of calls. She came to work, not for a photo-op."
Broderick, Parker's husband, was scheduled to help out at the New York headquarters and Falco was expected to make calls from Jay-Z's 40/40 club. Thurman was to volunteer at a downtown location, Usmagazine.com said.
People.com said Scarlett Johansson helped campaign for the Democractic presidential candidate at Ohio's Case Western Reserve University during the weekend.