"Getting Older" is a song by American singer-songwriter Billie Eilish. It is the opening track of her second studio album Happier Than Ever, released on July 30, 2021, through Darkroom and Interscope Records. Featuring a minimalist production, the song is backed by pulsing synthesizers, a bass guitar, and a keyboard that plays staccato notes. Its lyrics explore the positive and negative aspects of Eilish's transition into adulthood in the wake of her success that she first received as a teenager. Due to the subject matter, critics compared "Getting Older" to Nirvana's "Serve the Servants", the opening track of their 1993 studio album In Utero.