There are eight different charities affiliated with the project, including TEAR Fund's child trafficking prevention programme and Unicef's child nutrition programme in the Sahel near Africa's Sahara Desert.
Project spokesman Patrick Rose said the idea was to get discussions going about extreme poverty.
"It acts as a catalyst for hundreds and hundreds of conversations to take place," he said.
Those who wish to help in other ways can donate to one of the charities or sponsor people taking part.
Sharland joins a growing list of celebrities - including Jonah Lomu, Frank Bunce and MasterChef's Nadia Lim - planning to Live Below the Poverty Line.