The event in question is a planned fundraiser between the star couple and Clinton.

A pair of seats at the head table are going for as much as $353,400.

Clooney, who's long been rumored to be considering a political run of his own, has been outspoken in his support for Clinton.

"I think the world of her, and I would be very happy if she were president," Clooney told Fusion.

It's a far cry from the kind of fundraising Sanders' campaign takes in -- thousands of small-money donations.

His campaign is funded almost 100 percent by campaign donations from individuals.

On the other handabout one-fourth of Clinton's donations have come from super PACs and other groups.

Sanders is coming off a three-state sweep over the weekend, and the two candidates are now turning their attention to Wisconsin's primary. A recent Emerson poll showed Clinton with a 6 percent lead in the state.

This video includes a clip from the International Rescue Committee and images from Getty Images. 

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A rendering of the columbarium memorial that is estimated to be completed by next summer or fall in the southeast part of Oakland Cemetery, officials said. (Courtesy of Historic Oakland Foundation)

Credit: Historic Oakland Foundation