Artists including British pop band Florence and the Machine, US pop singer Colbie Caillat, pianist Herbie Hancock and singer-songwriter Elvis Costello will also perform at the December 11 show.
Washington said on Thursday he was "honoured to attend" the Nobel Peace Prize Concert "to help spread the message of global peace".
Last year, actor Will Smith and his actress wife Jada Pinkett Smith co-hosted the concert, honouring the 2009 laureate and Smith fan Barack Obama.
The winner of the 2010 Nobel Peace Prize will be announced in Oslo on October 8. The award is presented on December 10.
A nurse found hanging after a prank call from two Australian radio presenters about Kate Middleton's first pregnancy blamed herself for the embarrassing release of intimate details of the duchess's condition. Read More »
Outlaw Pete singer Bruce Springsteen has written a children's book based on the opening ballad of his 2009 album Working on a Dream. Read More »
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