The sister of the royal newlywed, professional baseball player and pop singer will be among those interviewed for a 90-minute special to air Dec. 14.
Also on the roster are the reality TV staple Kardashian family, television personality Simon Cowell, "Modern Family" co-stars Jesse Tyler Ferguson and Eric Stonestreet, and American business tycoon/author/television personality Donald Trump, ABC said.
Walters' pick for the No. 1 Most Fascinating Person of 2011 will be announced on the program.
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