The Up In The Air star is working with MTV Networks on the telethon.

An MTV spokesman said details are still being worked out.

Clooney's representative said the actor is in the process of helping organise the telethon, which would be likely to air on January 22 on all MTV Networks.

Several Hollywood stars have been calling for support for victims of the disaster.

Doctors Without Borders announced that Angelina Jolie and Brad Pitt were contributing one million dollars to the organisation's emergency medical operations.

And Oprah Winfrey began her TV talk show earlier this week by asking viewers to donate to the Red Cross.

"This is a time where we, as a global nation, should come together and support those who are in need," she said.

Coldplay singer Chris Martin urged people to donate to a Haiti appeal set up by Oxfam. He said when he visited Haiti with the charity a few years ago he found a country "of extreme poverty and brutal living conditions".