10th Annual Tribeca Film Festival nyc vanity fair Abigail Breslin

Abigail Breslin is looking fabulous these days ... and she's only 15!

The Little Miss Sunshine star worked the flashbulbs at the 10th Annual Tribeca Film Festival Vanity Fair Party in NYC. Love the little black dress!

Breslin will be starring in New Year's Eve alongside an all-star ensemble cast including Josh Duhamel, Ashton Kutcher, Jessica Biel, Zac Efron and Sofia Vergara.

See all the celebrities who attended last night's big event in our massive gallery below.