With New York Film Festival closing up and the BFI London Film Festival kicking off, the week was filled with appearances from the film industry's best. Some of the biggest celebrities in Hollywood made a comeback on the red carpet, including Jennifer Lawrence and Natalie Portman (both in Christian Dior). Blake Lively made her first public appearance after the announcement that she and husband Ryan Reynold's are expecting their first child. Meanwhile, Halle Berry debuted her new long bob, the haircut of the moment.

From Blake Lively to Sienna Miller and Jennifer Lawrence, the best dressed stars of the week

Sienna Miller

Halle Berry

Blake Lively

Jaime King

Bee Shaffer, Anna Wintour and Michael Kors

Chanel Iman

Kate Mara

Jessica Chastain

Emma Stone

Rosie Huntington-Whiteley

Beyoncé

Reese Witherspoon

Nicole Richie

Emmy Rossum

Miranda Kerr

Amal Alamuddin Clooney

Agyness Deyn

Amber Valetta

Jennifer Lawrence

Gisele Bündchen

Lily Allen

Poppy Delevingne

Julia Restoin-Roitfeld

Alessandra Ambrosio

Kate Bosworth

Naomi Watts

Natalie Portman

Mia Wasikowska

Keira Knightley

Zoe Saldana

From Blake Lively to Sienna Miller and Jennifer Lawrence...

The best dressed stars of the week