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.
Robin Williams, a brilliant shapeshifter who could channel his frenetic energy into delightful comic characters or harness it into richly nuanced work, has died in an apparent suicide. Read More »
Check out a livestream of the reveal of the new Call of Duty game at Gamescom. Read More »
Quickie time again!
A quick chat!
'I've grown so much'
Chatting about Strictly!
We chat to the lads!
Talking about life!
We sit down and talk!
Chatting in a cab!
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