Alexandra Savior McDermott (born June 14, 1995) is an American singer-songwriter originally from Portland, Oregon. Savior first came to public notice at age 17 in 2012 after Courtney Love publicly lauded her performance of covers on YouTube. Shortly after graduating high school in 2013, Savior pursued a music career in Los Angeles, and was signed to Columbia Records later that year, after which she began recording material with producers James Ford and Alex Turner. Her debut studio album, Belladonna of Sadness, was released on April 7, 2017, by Columbia Records.

After being dropped by Columbia Records in 2019, Savior was signed to Danger Mouse's independent label, 30th Century Records, who released her second studio album, The Archer, on January 10, 2020. The album was met with critical acclaim. In June 2024, Savior announced her signing with RCA Records. Her third studio album, Beneath the Lilypad, was released by RCA on May 16, 2025.

Alexandra Savior McDermott was born on June 14, 1995, in Portland, Oregon. Her mother was diagnosed with cervical cancer when she was pregnant with Savior but during her pregnancy she was cured. Because of this event, her father chose “Savior” as her middle name. She has one older brother.

Savior was raised in Vancouver, Washington. At age 12, her parents divorced, and her father relocated to New Orleans, Louisiana. She first became interested in songwriting at age 14, in part inspired by her older brother, also a musician. Savior grew up listening to "a lot of soul and grunge", including her father's records by artists such as Pearl Jam, Otis Redding, and Jimi Hendrix. As a teenager, she was also an admirer of Jack White, Etta James, and The Velvet Underground. She began taking singing lessons as a teenager. As a student, Savior struggled socially and had to change high schools due to being bullied by peers. Savior has bipolar I disorder.

Savior first achieved public attention in September 2012 at age 17 after rock singer-songwriter Courtney Love publicly complimented her after viewing a cover of Angus & Julia Stone's "Big Jet Plane" that Savior had uploaded on YouTube. "She’s going to be huge," Love declared. "I am not ever wrong when it comes to spotting talent." Love began corresponding with Savior by email and, eventually, by phone. "She called me up," Savior recalled. "We had a land line at my house, and the phone was shaped like a big tomato. So she would call me on the tomato phone, and I would sit in the kitchen and we would talk and talk. She gave me good advice. She told me not to let anybody turn me into a puppet."

It’s hard to have people try to mold you into a version of what they find sellable, or a version of somebody else, or a version of everybody else. When I was 16 I went to a record label … I did a showcase and sang them three of my songs. Afterwards they sat me on a stool and asked me, “Do you want to be like Pink or Katy Perry?” And I thought, “Oh, what have I gotten myself into?”

By April 2013, Savior had done some modeling for Erin Fetherston and said she hoped her first album would be out soon. She graduated from high school in June 2013 and had plans to attend art school, but opted instead to relocate to Los Angeles and pursue a music career. "I moved to an apartment in Hollywood behind a strip club called the Seventh Veil," she commented. "It was terrifying. I got signed about a month later. I moved immediately." Around September 2013, Savior was signed to a recording contract by Columbia Records, which she later admitted she was not prepared for artistically or socially. Despite this, she stated that Columbia was the best choice given that other labels were interested in modeling her after established pop artists such as Katy Perry or Pink. In October 2013, Linda Perry was publicly comparing Savior's potential to that of Fiona Apple.

In 2014, Savior began writing and recording her material for her debut studio album in Los Angeles with James Ford of The Last Shadow Puppets and Alex Turner of Arctic Monkeys as producers. The album initially had the working title Strange Portrait, but was retitled Belladonna of Sadness after the 1973 Japanese anime of the same name. Savior initially planned to release the album under the stage name Alexandra Semitone, but Turner advised her to change her name and use her middle name as the last. "Miracle Aligner", a song written by Savior and Turner during the recording sessions, though cut from the album, was re-recorded by Turner's band the Last Shadow Puppets and later featured on their 2016 album, Everything You've Come to Expect.