Alexandra Daddario

In 2021, she starred in the first season of the HBO satirical anthology series The White Lotus, for which she received critical acclaim and a nomination for the Primetime Emmy Award for Outstanding Supporting Actress in a Limited or Anthology Series or Movie. In 2023, she began playing the lead role of Dr. Rowan Fielding in the AMC horror series Mayfair Witches.

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, English, Irish, and Slovak descent. She has a younger brother, Matthew Daddario, and a younger sister, Catharine, who are also both actors. Her paternal grandfather was Emilio Q. Daddario, a 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 the 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 said 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.

Daddario made her television debut at age 15, when she played victimized girl Laurie Lewis in the ABC daytime soap opera All My Children. Her first major role was as Annabeth Chase in the fantasy adventure film Percy Jackson & the Olympians: The Lightning Thief (2010). She also had a recurring role as Neal Caffrey's love interest, Kate Moreau, in the USA Network procedural drama series White Collar. In 2011, she appeared in the comedy film Hall Pass and had a recurring role as Rachel in NBC's comedy-drama series Parenthood. In 2012, Daddario starred in the video for Imagine Dragons' song "Radioactive", which surpassed 1 billion views on YouTube. She appeared as a guest in an episode of the FX sitcom It's Always Sunny in Philadelphia. Her first starring role after Percy Jackson was as Heather Miller in the 2013 slasher film Texas Chainsaw 3D. In August 2013, Daddario reprised her role as Annabeth Chase in Percy Jackson: Sea of Monsters. She then appeared in the romantic horror comedy Burying the Ex. Burying the Ex premiered out of competition at the Venice Film Festival in 2014. In January 2013, Daddario was cast in the first season of the HBO anthology series True Detective. She appeared in a four-episode arc as Lisa Tragnetti, a court reporter having an extramarital affair with one of the main characters.

Daddario played a supporting role in the 2015 blockbuster disaster film San Andreas. The same year, she made a cameo appearance in the pilot of the Fox comedy series The Last Man on Earth and a guest appearance on American Horror Story: Hotel as a fictionalized version of designer Natacha Rambova. In 2016, Daddario had a supporting role in the Nicholas Sparks romantic drama film The Choice, directed by Ross Katz. She then starred in the 2017 film adaptation of Baywatch as Summer Quinn, who was portrayed by Nicole Eggert in the TV series. The same year, Daddario portrayed Kate Jeffries in the road trip comedy The Layover (2017), directed by William H. Macy. In 2018, Daddario appeared in the music video "Wait" by Maroon 5 and starred as Avery Martin in the romantic comedy When We First Met, opposite the film's co-writer Adam DeVine. She made a cameo appearance as a scuba diver in Rampage, directed by Brad Peyton, but her scenes were cut from the film. Daddario starred as Constance Blackwood in We Have Always Lived in the Castle, a film adaptation of Shirley Jackson's mystery thriller novel of the same name. She also starred in the psychological thriller Night Hunter, which premiered at the LA Film Festival on September 28, 2018. Daddario portrayed Jade in the first season of the CBS All Access series Why Women Kill. In 2019, Daddario starred in and produced two films, the romantic comedy Can You Keep a Secret?, based on the novel of the same name by Sophie Kinsella, and the horror thriller We Summon the Darkness, directed by Marc Meyers. In 2020, Daddario provided the voice of Lois Lane in the superhero animated film Superman: Man of Tomorrow and starred in the noir film Lost Girls & Love Hotels. She also appeared in Songbird, the first film shot in Los Angeles during the COVID-19 pandemic.

In 2021, she appeared in the HBO social satire anthology series The White Lotus and the film Die in a Gunfight. For her performance in the former, she received widespread critical acclaim alongside the rest of the cast, with The Hollywood Reporter writing that her performance "should redefine how audiences and casting directors see her." She was nominated for the Primetime Emmy Award for Outstanding Supporting Actress in a Limited or Anthology Series or Movie in 2022. Daddario starred in the 2022 coming-of-age film Wildflower. Beginning in 2023, she starred in the AMC series Mayfair Witches, based on the Anne Rice novel series Lives of the Mayfair Witches. On August 28, 2025, Daddario was announced to appear in the horror film Inground and will star John Cho and Kyle Gallner.

On May 13, 2021, Daddario confirmed that she was in a relationship with producer Andrew Form. On December 2, 2021, they announced their engagement. They married in June 2022. In July 2024, Daddario announced she was pregnant after previously suffering a miscarriage. On October 31, 2024, Daddario announced on Instagram the birth of her first child. In February 2026, Daddario and Form announced their separation, with Daddario filing for divorce on the day of their separation announcement.