Thesp joins New Line laffer from Garry Marshall

Sienna Miller’s heading to New York and “New Year’s Eve,” joining New Line’s ensemble comedy.

The British actress is the latest addition to the pic, to be directed by Garry Marshall. Other cast includes Jessica Biel, Abigail Breslin, Robert De Niro, Ashton Kutcher, Sarah Jessica Parker, Michelle Pfeiffer, Til Schweiger and Hilary Swank.

Biel and Kutcher were in Marshall’s “Valentine’s Day,” but the characters from that New Line pic won’t be in “New Year’s Eve” — which will be set in New York and follow intertwining stories of characters trying to navigate their way through romance on New Year’s Eve.

Marshall is expected to return to direct, as are producers Mike Karz and Wayne Rice, and screenwriter Katherine Fugate. New Line has given “New Year’s Eve” a Dec. 9, 2011, release date.

Miller was last seen in “G.I. Joe: Rise of the Cobra.”

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