Alexander Glantz, known professionally as Alexander 23, is an American singer-songwriter and record producer. Since releasing his first string of singles and EP in 2019, he has worked with artists such as Olivia Rodrigo, John Mayer, Selena Gomez, Tate McRae, Charlie Puth, Noah Kahan, Role Model, Jeremy Zucker, Kenny Beats and mxmtoon, and has accumulated hundreds of millions of streams on Spotify on his own music.
Glantz was raised in Deerfield, Illinois a suburb of Chicago, Illinois. At the age of 8, Glantz saw his father playing guitar which inspired him to learn as well. As a teenager, he joined a band where he also learned how to play bass, piano, and drums.
After high school, Glantz went to the University of Pennsylvania for engineering, but dropped out a year later to pursue music more seriously. Glantz then moved to Los Angeles, California to begin songwriting and producing for others and soon after he decided to write songs for himself and to pursue a career as an artist.

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