The idea of Ben Affleck living on $1.50 a day sounds ridiculous, right? Maybe just as ridiculous as Hugh Jackman doing the same thing.

The "Argo" director-producer-star is the latest celebrity showing his support for the Global Poverty Project's Live Below the Line campaign, a position Jackman initiated for the organization in 2011.

The Oscar winner took on the organization's challenge to spend five days feeding himself on only $1.50 a day, which is the the U.S. equivalent of the extreme poverty line. He showed his support for the initiative on Twitter.

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"1.4 billion people live on less than $1.50/day. I'm joining Live #BelowTheLine on behalf of @easterncongo. Will you?," Affleck tweeted.

The challenge is meant to "give a glimpse into the lives of 1.4 billion people who have no choice but to live below the line every day – and who have to make $1.50 cover a lot more than food," according to the organization's website.