Sarah Jessica Parker, Matthew Broderick, Uma Thurman and Edie Falco worked the phones for U.S. presidential hopeful Barack Obama, reported.

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 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, said. said Scarlett Johansson helped campaign for the Democractic presidential candidate at Ohio's Case Western Reserve University during the weekend.