Leighton Marissa Meester (born April 9, 1986) is an American actress and singer. She is mostly known for her starring role as Blair Waldorf in the teen drama series Gossip Girl (2007–12). She has also appeared in the 2010 country drama film Country Strong, the 2011 thriller The Roommate, the 2011 romantic-comedy Monte Carlo, and the comedies The Oranges (2011) and That's My Boy (2012). Meester made her Broadway debut in 2014 in Of Mice and Men.
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Good Cop/Bad Cop
Det. Lou Hickman · (8 episodes)
2025

EXmas
Ali
2023

River Wild
Joey
2023

My Father's Dragon
Sasha (voice)
2022

The Weekend Away
Beth
2022

How I Met Your Father
Meredith · (8 episodes)
2022

Semper Fi
Clara
2019

Lights Out with David Spade
Self - Panelist · (1 episode)
2019

The North Wind's Gift
Gemma
2018

Single Parents
Angie · (45 episodes)
2018

The Orville
Laura Huggins · (2 episodes)
2017

Making History
Deborah Revere · (9 episodes)
2017

Zoolander: Super Model
Leighton Meester (voice)
2016

Unity
Narrator (voice)
2015

The Late Late Show with James Corden
Self - Guest · (1 episode)
2015

The Last Man on Earth
Zoe · (1 episode)
2015

Life Partners
Sasha
2014
National Theatre Live: Of Mice and Men
Curley's Wife
2014

The Judge
Carla Powell
2014

By the Gun
Ali Matazano
2014

Like Sunday, Like Rain
Eleanor
2014

That's My Boy
Jamie Martin
2012

The Chew
Self · (1 episode)
2011

The Oranges
Nina Ostroff
2011

Monte Carlo
Meg
2011

The Roommate
Rebecca Evans
2011

Country Strong
Chiles Stanton
2010

Going the Distance
Amy
2010

Date Night
Katy
2010

Late Night with Jimmy Fallon
Self · (1 episode)
2009

Killer Movie
Jaynie Hansen
2008

Remember the Daze
Tori
2008

CollegeHumor Shorts
Leighton Meester · (1 episode)
2007

The Haunting of Sorority Row
Samantha Willows
2007

Gossip Girl
Blair Waldorf · (121 episodes)
2007

Drive Thru
Mackenzie Carpenter
2007

Secrets of a Small Town
Kayla Rhodes · (1 episode)
2007

Shark
Megan · (3 episodes)
2006

Inside
Josie
2006

Flourish
Lucy Covner
2006

Surface
Savannah Barnett · (15 episodes)
2005

The Tyra Banks Show
(1 episode)
2005

Numb3rs
Karen Camden · (1 episode)
2005

House
Ali · (2 episodes)
2004

Veronica Mars
Carrie Bishop · (2 episodes)
2004

Entourage
Justine Chapin · (3 episodes)
2004

Tarzan
Nicki Porter · (8 episodes)
2003

Hangman's Curse
Elisha Springfield
2003
The Big Wide World of Carl Laemke
Tanni
2003

Jimmy Kimmel Live!
(1 episode)
2003

CSI: Miami
Heather Crowley · (1 episode)
2002

8 Simple Rules
Nikki · (1 episode)
2002

The Bachelor
Self · (1 episode)
2002

24
Debbie Pendleton · (3 episodes)
2001

Crossing Jordan
Marie Strand · (1 episode)
2001

Boston Public
Sarah Breen · (1 episode)
2000

Once and Again
Amanda · (1 episode)
1999

Teen Choice Awards
Self · (2 episodes)
1999

The View
Self · (1 episode)
1997

7th Heaven
Kendall · (2 episodes)
1996

Law & Order
Alyssa Turner · (1 episode)
1990

LIVE with Kelly and Mark
Self - Guest · (1 episode)
1988