They join previously announced performer Carrie Underwood, who will be performing for over 1 million fans in Times Square, and millions more on TV, moments before the ball drops on Thursday, December 31 beginning at 8 p.m. ET/PT on the ABC Television Network.

"It's been an incredible year for us and we can't wait to ring in the New Year with all our fans on New Year's Rockin' Eve," said One Direction. "It's an honor to be back at the Billboard Hollywood Party for our second year."

The show will include hours of special performances and reports on New Year's celebrations from around the globe. Ryan Seacrest will host and lead the traditional countdown to midnight from Times Square in New York City as he has for the last 10 years with live reporting from actress and comedian Jenny McCarthy. Popstar Fergie will oversee the festivities at the Billboard Hollywood Party in Los Angeles.

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