Jessica Biel Bares Huge Pregnant Belly!

Credit: Fame Pictures

Is there a little JT in there?

Jessica Biel sported an enormous, pregnant belly -- showcased with a cut-off t-shirt and pink sweatpants -- in NYC on Monday.

No, the 29-year-old actress isn't joining the Hollywood Mom's club: The bare bump is fake, worn on set as Biel shot New Year's Eve with Seth Meyers, who drove her around in a petty cab in one scene.

PHOTOS: See how these stars dressed their real baby bumps

Biel and Meyers are just two stars in the A-list ensemble cast of the romantic comedy from the producers of Valentine's DayAshton Kutcher, Robert DeNiro, Katherine Heigl, Sofía Vergara, Zac Efron, Lea Michele, Josh Duhamel, Michelle Pfeiffer, Alyssa Milano and Hilary Swank also star.

PHOTOS: See more pics of Jessica's huge baby bump from PopSugar

New Year's Eve debuts in theaters Dec. 9.