Celebrities have stepped in to take over for former co-host Regis Philbin, who departed the show Nov. 18, 2011.
Radcliffe, who originated the role of Finch in the How to Succeed... revival, was nominated for Outer Critics Circle and Drama Desk awards for his performance. He has also been seen on Broadway in Equus and is best known for his work in the "Harry Potter" movie series.
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