Note to all partygoers: if you open your inbox and there's an invitation from Chanel, you just don't say "no." It's a tip that style stars including Joan Smalls, Hannah Bronfman, and Lily Aldridge know well. So when Chanel feted the Tribeca Film Festival this week, it was a full house.

And that wasn't the only downtown hot spot; earlier, Zac Posen could be found on the arm of Katie Holmes [1], who did his design proud at the Tribeca Film Festival. See all the dresses, gowns, and suits that made us take notice so far this week!

Source: Billy Farrell Agency [2]

Joan Smalls

Joan Smalls at Chanel's Tribeca Film Festival Artist Dinner.

Hannah Bronfman

Hannah Bronfman at Chanel's Tribeca Film Festival Artist Dinner.

Lily Aldridge

Lily Aldridge at Chanel's Tribeca Film Festival Artist Dinner.

Giovanna Battaglia

Giovanna Battaglia at Chanel's Tribeca Film Festival Artist Dinner.

Julia Restoin Roitfeld

Julia Restoin Roitfeld at Chanel's Tribeca Film Festival Artist Dinner.

Atlanta de Cadenet

Atlanta de Cadenet at Chanel's Tribeca Film Festival Artist Dinner.

Leigh Lezark

Leigh Lezark at Chanel's Tribeca Film Festival Artist Dinner.

Constance Jablonski

Constance Jablonski at Chanel's Tribeca Film Festival Artist Dinner.

Laura Love

Laura Love at Chanel's Tribeca Film Festival Artist Dinner.

Hilary Rhoda

Hilary Rhoda at Chanel's Tribeca Film Festival Artist Dinner.

Derek Blasberg

Derek Blasberg at the Brown Shoe Company anniversary party.

Jessica Joffe and Chelsea Leyland

Jessica Joffe and Chelsea Leyland at Carolina Herrera's celebration for the archive collection.

Liberty Ross

Liberty Ross at Carolina Herrera's celebration for the archive collection.

Nate Berkus

Nate Berkus at Charm & Chain's anniversary party.

Jodie Snyder Morel and Danielle Snyder

Jodie Snyder Morel and Danielle Snyder at Charm & Chain's anniversary party.

Brad Goreski

Brad Goreski at the Elle Women in Music celebration.

Crystal Renn

Crystal Renn in Chanel at the New Yorkers For Children Dinner Dance.

Selita Ebanks

Selita Ebanks in Jacob & Co. jewelry at the New Yorkers For Children Dinner Dance.

Elettra Wiedemann

Elettra Wiedemann at the New Yorkers For Children Dinner Dance.

Nina Agdal

Nina Agdal in Marchesa Notte at the New Yorkers For Children Dinner Dance.

Eva Chen

Eva Chen in Marc Jacobs at the New Yorkers For Children Dinner Dance.

Jodie Snyder Morel and Danielle Snyder

Jodie Snyder Morel and Danielle Snyder in Gabriela Cadena at the New Yorkers For Children Dinner Dance.

Laura Love and Derek Blasberg

Laura Love and Derek Blasberg at the New Yorkers For Children Dinner Dance.

Chelsea Leyland

Chelsea Leyland at the New Yorkers For Children Dinner Dance.

Leandra Medine

Leandra Medine at the New Yorkers For Children Dinner Dance.

Rebecca Minkoff

Rebecca Minkoff at the New Yorkers For Children Dinner Dance.

Katie Holmes and Zac Posen

Zac Posen and Katie Holmes [3] in Zac Posen at the Tribeca Film Festival premiere of Miss Meadows.