Andrew Johnston (born 23 September 1994) is a British singer who rose to fame when he appeared as a boy soprano on the second series of the British television talent show Britain's Got Talent in 2008. Although he did not win the series, he received a contract to record on the SyCo Music label owned by the Britain's Got Talent judge Simon Cowell. Johnston's debut album, One Voice, was released in September of the same year, and reached number four on the British album charts. Although Johnston originally performed as a treble, his voice has since matured to tenor, and he is currently not recording, allowing his voice to develop.

Johnston was born in Dumfries, Scotland, and his parents separated when he was an infant. He and his mother moved to Carlisle, where they lived in "poverty".[3] He became head chorister at Carlisle Cathedral, and was bullied at school because of his love of classical music. While some journalists have argued Britain's Got Talent producers took advantage of Johnston's background, others have hailed his story as inspirational. In 2009, he graduated from Trinity School. Johnston continues to live in Carlisle with his mother, and is now home tutored. He attends lessons at the Royal Northern College of Music.