Tobey Maguire, sigh -- leader of ServiceNation's Ambassadors

Today Service Nation launched its celebrity Ambassadors program, engaging famous people in service projects as a way of highlighting the new day of service and inspiring the public to get involved proactively in building stronger communities.

Guided by an Ambassador’s Council — and led by actor Tobey Maguire — other celebrities who’ve participated in community service events today include other actors: Cameron Diaz in Boston, Anne Hathaway in Los Angeles, Oscar de la Hoya in Los Angeles, and Anna Sophia Robb in her hometown Denver.

Another initiative Service Nation has spearheaded this week included a Mayors Meeting in New York yesterday — convened by Mayor Michael Bloomberg, Hands On Network, AARP, and the Entertainment Industry Foundation. The two dozen mayors from around the country came together to announce their commitments to the Cities of Service campaign, following in Mayor Bloomberg’s footsteps to highlight and support civic service in their cities.

Finally, Service Nation is hosting an event tonight in New York City at the Beacon Theatre where Secretary of State Clinton will keynote, and many other public leaders and entertainment industry stars will speak and perform.

Idealist’s Joanne Eng is on the ground at that event and will be bringing back a full report for us in the coming days.