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, Noah Kahan, Tate McRae, Charlie Puth, Laufey, Role Model, Reneé Rapp, Omar Apollo, Selena Gomez, Jeremy Zucker, Joji, Bella Kay, Kenny Beats, David Kushner, Addison Rae, Teezo Touchdown, Glaive and Megan Thee Stallion, and has accumulated over a billion streams on his own music.