Alex Callier (born 6 December 1972, in Sint-Niklaas, Belgium) is a member of Belgian rock band Hooverphonic.
Callier studied image, sound and editing at RITCS between 1990 and 1993. After his studies he worked as a sound engineer for the public Flemish broadcaster VRT. In 1995 he co-founded Hoover (later Hooverphonic), where he is active as a musician, as well as a composer and producer. In 1999 he wrote the music for the Belgian film Shades. In 2000 he received the ZAMU Award for Best Belgian producer.In 2009, he launched his solo project Hairglow. In 2018, he co-wrote a Matter of Time, the song Sennek used to enter the Eurovision Song Contest.