Kevans was born in Birmingham but grew up in Germany on a military base. He moved to Llanon in West Wales at the age of 10. After a short stint in the army, Kevans moved to London where he became involved in the acoustic music scene, playing at venues such as Ronnie Scotts, the Water Rats and the Borderline. He also played trumpet for Ska bands such as The Hot Knives and The Riffs.
In 2008 Kevans won the International Songwriting Competition with his song 'Out There' and provided music for the computer game Scooby Doo.
Shortly after that, Kevans was selected to represent Ireland in the Karlshamn Song Contest where he came 4th. The programme was broadcast live throughout the Baltic region and Sweden.
Kevans played at CMJ in New York in October 2009 where he was spotted by a representative of Wildflower Records. He was offered a deal with the New York label that night.
Kevans' first album, Everything You Do, was produced by Ian Grimble. The album featured slide guitarist Al Perkins and guest vocals came from former Beautiful South songstress Alison Wheeler. Keyboard skills were provided by James Blunt’s pianist Paul Beard and guitar was supplied by ex-Steely Dan and Doobie Brothers guitarist Elliot Randall.
The album was released in February 2010 and received much critical acclaim. Q Magazine said ”The country flavoured singer-songwriter pop of London Will Kevans can be both delightful & sincere"  and the Guitarist Magazine said Kevans "has a great voice & polished pop rock writing." 
Kevans is a Gibson sponsored artist.
Kevans has drawn well-known characters such as Billy No Mates and Postman Prat for Zit comic, Dennis the Menace for the BBC, and the Ribena berries. He was chosen to be the Labour Party's caricaturist for their conference in 1997. Tony Blair, Cherie Blair and Mo Mowlam were among the people who sat for him. Kevans' illustrations have appeared in many magazines and newspapers, including Penthouse, The Telegraph, The Sun and The Mirror.