Alexandra Anna Daddario (born March 16, 1986) is an American actress. She had her breakthrough portraying Annabeth Chase in the Percy Jackson film series (2010–2013). She has since starred as Paige in Hall Pass (2011), Heather Miller in Texas Chainsaw 3D (2013), Blake Gaines in San Andreas (2015), Summer Quinn in Baywatch (2017), and Alexis Butler in We Summon the Darkness (2019). She has also guest starred in television series such as White Collar, It's Always Sunny in Philadelphia, True Detective, New Girl, and American Horror Story: Hotel. In 2021, she starred in the first season of the HBO series The White Lotus, for which she received widespread critical acclaim and an Emmy nomination for Outstanding Supporting Actress in a Limited or Anthology Series or Movie in 2022. In 2023 she began playing the lead role of Dr. Rowan Fielding in the AMC show Mayfair Witches based on a series of novels written by author Anne Rice.

Early life and education
Alexandra Anna Daddario was born in New York City on March 16, 1986, the eldest child of Christina, a lawyer, and Richard Daddario, a prosecutor and former head of the New York City Police Department counterterrorism unit. She is of Italian, Irish, English, and Hungarian descent. She has a younger brother, Matthew Daddario, and a younger sister, who are both actors as well. Her paternal grandfather was Emilio Q. Daddario, a Democratic member of the U.S. House of Representatives for Connecticut from 1959 to 1971.

Daddario was raised on Manhattan's Upper East Side. She attended Brearley School and the Professional Children's School. Daddario said she decided to be an actress at the age of 11. "I always loved storytelling," she stated in 2019. "It was just something I genuinely wanted to do – and I could've done anything, really. I did have every opportunity on the planet." She attended Marymount Manhattan College before dropping out to pursue acting full-time. She has spent years studying the Meisner acting technique.