Born Josiah Alexander Sila in Denpasar, Bali, Indonesia in 2003, Alexander was introduced to music by his father, an amateur musician and jazz aficionado. By age six, he had taught himself how to play piano by listening to albums by Louis Armstrong, Thelonious Monk, Bill Evans, and others. Without formal training, and initially only playing on a small keyboard his father had given him, Alexander achieved a high degree of proficiency. By age eight, he was jamming with local professionals, and in 2012 he had the opportunity to play for Herbie Hancock, who was visiting Jakarta, Indonesia as a UNESCO Goodwill Ambassador. The following year, Alexander won first place in the Master Jam-Fest in Odessa, Ukraine.
In 2014, he relocated with his family to New York City, where Wynton Marsalis invited him to perform at a Jazz at Lincoln Center gala. Several more high-profile shows followed, including appearances at the Apollo Theater, Juilliard, and the Copenhagen Jazz Festival. Many of these performances were widely covered, with viral videos of the proficient Alexander popping up online. On the heels of this recognition, he released his debut album, 2015's Jason Olaine-produced My Favorite Things, on the Motema Music label. Recorded when Alexander was only 11, the album featured the pianist backed by bassists Larry Grenadier and Russell Hall, drummers Sammy Miller and Ulysses Owens, Jr., and trumpeter Alphonso Horne. Featuring eight standards and one Alexander original, the album topped the jazz albums chart hit number 59 on the Billboard 200. It also garnered Grammy nominations for Best Instrumental Jazz Album and Best Improvised Jazz Solo.
A year later, he again topped the Billboard Jazz Albums chart with his sophomore recording, Countdown. Produced by Jason Olaine, the album featured contributions from bassist Grenadier, drummer Owens, and saxophonist Chris Potter. For his rendition of the John Coltrane-penned title track, Alexander earned a 2017 Grammy nomination for Best Improvised Jazz Solo. Also in 2017, he issued the concert album, Joey.Monk.Live!, marking Thelonious Monk's centennial.
Alexander's third studio album, Eclipse, arrived in 2018 hitting number three on the jazz chart. Recorded over a three-day period that began on the day of the 2017 solar eclipse, the album featured the pianist backed by his rhythm section of bassist Reuben Rogers and drummer Eric Harland. Also featured was a guest appearance by saxophonist Joshua Redman. Later that year he released the holiday EP A Joey Alexander Christmas.
In 2020, he made his major-label debut for Verve with Warna. The album found him leading a trio, this time featuring veteran bassist Larry Grenadier and drummer Kendrick Scott. He also augmented several tracks with Venezuelan-born percussionist Luisito Quintero and flutist Anne Drummond. It became his fifth album to reach the top 20 of the Billboard jazz chart. With 2022's Origin, Alexander moved to the Mack Avenue label, expanding his Warna trio with acclaimed saxophonist Chris Potter and guitarist Gilad Hekselman. ~ Matt Collar, Rovi