BEIJING, Jan. 16 -- "Desperate Housewives" star Eva Longoria Parker swore off plastic water bottles and "Charlie's Angels" actress Lucy Liu also vowed to help the environment by riding the subway when she's in New York. In a show of support for President-elect Barack Obama's call for community service, more than 50 Hollywood celebrities have pledged to take positive action, in a video from husband-and-wife acting duo Ashton Kutcher and Demi Moore.

The video will premiere on social networking website MySpace.com by next Monday, the day before Obama's inauguration.

"There's an assumption that this one man is going to take on his new job full-time and somehow wave a magic wand of change, and I don't believe that to be true," Kutcher, 30, told Reuters.

"I think that we have to be the leaders, and that's not celebrities -- I think that we as citizens have to be leaders of the movement that we want to create," said the actor, best known for playing a dim-witted stoner in the teen sitcom "That '70s Show."

Obama has appealed to Americans to help better their communities and he has promised to expand national service programs like AmeriCorps and the Peace Corps.

It's no surprise celebrities are among the first to respond, as Hollywood figures eagerly lined up behind Obama during his presidential campaign. But so far, few celebrities recording pledges have promised to sign up for programs Obama is expanding, preferring a more varied platter of projects.

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