Here is a comprehensive summary of the Wikipedia article about Blake Lively:

Blake Lively, born Blake Ellender Brown on August 25, 1987, is an American actress who made her professional debut at age ten in her father's 1998 film, Sandman, before gaining her breakthrough role in The Sisterhood of the Traveling Pants (2005). She achieved widespread stardom playing Serena van der Woodsen in The CW's hit teen drama Gossip Girl (2007–2012), concurrently appearing in films such as The Town (2010).

After Gossip Girl, Lively shifted her focus primarily to films, starring in the romantic fantasy The Age of Adaline (2015), the survival thriller The Shallows (2016), and the comedy thriller A Simple Favor (2018). Expanding her career, she directed Taylor Swift's 2021 music video "I Bet You Think About Me" and produced and starred in the 2024 romantic drama It Ends with Us. While It Ends with Us became her biggest box office success, it also generated significant controversies, including multiple lawsuits. Despite this, Lively was recognized for her influence, being included in Time magazine's 100 most influential people list in 2025.