Each night the network will air "TakePart Live, " a talk show whose topics will be chosen earlier in the day by viewers going online to TakePart.com, Participant Media's social action hub.

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The comedy skit show stands apart from the rest not only because it is a cast of comedians versus a single talk show host, but also because it airs live only once a week, meaning there are less opportunities for artists to score an appearance.

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In a video message that aired on CNN's "Larry King Live, " the talk show host grinned as he accepted Kutcher's challenge.

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"Mad Men" and "American Horror Story" lead this year's Emmy nominations with 17 nods apiece, while "Downton Abbey" and "Modern Family" round out the top of the pack -- plus a first-time nomination for Kimmel's own late-night talk show, "Jimmy Kimmel Live!"

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