Tom Cruise
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"They really wanted to do it, right from the start," concert organizer Odd Arvid Stroemstad tells the Associated Press about Cruise, 42, and Winfrey, 50. "They clearly know what the Nobel concert is, and what the Nobel Peace Prize is about."
Also onstage for the Dec. 11 concert will be a roster of entertainers that so far includes Cyndi Lauper, Patti LaBelle, opera's Andrea Bocelli, jazz singer Diana Krall and British teen soul singer Joss Stone.
All the celebrities appear for free, though their expenses are covered. Last year's emcees were husband and wife Michael Douglas and Catherine Zeta-Jones.
Maathai, 64, was honored by the Nobel committee as founder of the Green Belt Movement, which has sought to empower women, improve the environment (by planting 30 million trees) and fight corruption in Africa for almost 30 years.
