Ashton Kutcher

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As the world waits for Obama to be sworn in as president, Ashton and Demi are hoping to initiate change now. The couple is pledging to answer Obama's call to service with a special project to ignite the passion for positive change with their fellow citizens.

For their new Web video "I Pledge," Ashton and Demi asked their celebrity friends and colleagues to state their pledge for change as a way to inspire others and hold them accountable for how they're willing to be of service. "Because ultimately, if we really are inspired, then we will see the change that we want," Ashton says.

From Cameron Diaz to Sean "Diddy" Combs to Dakota Fanning to Eva Mendez, watch what celebrities are pledging to change in their livesWatch