Blake Ellender Lively (née Brown; born August 25, 1987) is an American actress. She is the recipient of various accolades, including three Teen Choice Awards, a People's Choice Award, and nominations for two Critics' Choice Awards and an Academy of Country Music Award.

Born in Los Angeles, California, Lively is the daughter of actor Ernie Lively, and made her professional debut in his directorial project Sandman (1998). She starred as Bridget Vreeland in The Sisterhood of the Traveling Pants (2005) as well as its sequel The Sisterhood of the Traveling Pants 2 (2008) to commercial success. She appeared opposite Justin Long in the comedy Accepted (2006) and gained notability and widespread recognition for her portrayal of Serena van der Woodsen in the CW teen drama television series Gossip Girl (2007–2012).

She has starred in rom coms including New York, I Love You (2008) and The Private Lives of Pippa Lee (2009). Lively starred opposite Ben Affleck in the crime thriller The Town (2010) and appeared with her future husband Ryan Reynolds in Green Lantern (2011). She was in the ensemble cast of Savages (2012) and garnered acclaim for portraying the titular character in romantic fantasy The Age of Adaline (2015). She appeared in survivor horror film The Shallows (2016) and psychological drama All I See Is You (2016). She starred opposite Anna Kendrick in the box-office hit A Simple Favor (2018), and in The Rhythm Section (2020), where she received critical praise. In 2021, she made her directorial debut with the music video for Taylor Swift's "I Bet You Think About Me" to positive critical reception, and was nominated for an Academy of Country Music Award.