Leighton Marissa Claire Meester, born on April 9, 1986, in Marco Island, Florida, is an accomplished American actress, singer, and model best known for her iconic role as Blair Waldorf on the hit CW television series Gossip Girl, which aired from 2007 to 2012. Meester's portrayal of the affluent and ambitious Blair captivated audiences and established her as a prominent figure in the entertainment industry.

Raised in a family that had its roots in the entertainment business, Leighton’s mother, Connie Meester, worked as a writer and producer, which likely influenced her daughter's artistic aspirations. Meester's journey into acting began at a young age, with her early performances in community theater and her participation in various productions that laid the groundwork for her future career. She made her television debut in 1999 on the soap opera Guiding Light and continued to build her resume with guest roles in shows like Law & Order and Surface.

Meester's breakthrough came with the casting of Gossip Girl, where she starred alongside Blake Lively, Penn Badgley, and Chace Crawford. The show quickly became a cultural phenomenon, and her characterization of Blair Waldorf earned her critical acclaim, fan adoration, and several award nominations. Following the series' conclusion, Meester expanded her filmography with appearances in movies such as Killer Movie (2008), Country Strong (2010), The Roommate (2011), Monte Carlo (2011), The Oranges (2011), and The Judge (2014). In 2018, she took on a new role in the ABC sitcom Single Parents, which showcased her comedic talents and ran until 2020.

In addition to her acting career, Leighton Meester ventured into music, gaining recognition as a guest vocalist on Cobra Starship's hit single "Good Girls Go Bad," which charted in the top ten on the Billboard Hot 100 in 2009. She subsequently released her solo singles "Somebody to Love" and "Your Love's a Drug," both of which were well-received. Meester's debut studio album, "Heartstrings," was independently released in 2014, showcasing her musical versatility and artistic depth.

Leighton Meester has also made her mark in the fashion world, having modeled for high-profile brands such as Jimmy Choo, Herbal Essences, and Vera Wang. Her work in various campaigns further solidified her status as a style icon.

In recent years, Meester has continued to evolve as an artist, with her latest project being the CW/Stan comedy-drama series Good Cop/Bad Cop, which premiered in 2025 and earned her a nomination for the Australian Logie Award for Best Actress. Outside of her professional life, Meester is married to actor Adam Brody, with whom she shares a family, and she continues to navigate the challenges and rewards of balancing motherhood with her thriving career in entertainment.