Deryck Jason Whibley (born March 21, 1980) is a Canadian musician and producer, best known for his work as the guitarist, lead vocalist, songwriter and producer of the Juno Award-winning rock band Sum 41.
Whibley was born in Scarborough, Ontario. He never met his father, and talks of it in the song "Dear Father" from Sum 41's fifth album Underclass Hero. He is of English descent. He was in several bands before he met Steve Jocz in high school. His first band was called "The Powerful Young Hustlerz", a hip hop band that covered songs from The Beastie Boys and N.W.A. Deryck and Steve became good friends and started a band called "Kaspir". The band consisted of Whibley as lead singer, Jocz on drums, Mark Spicoluk on bass, Dave Baksh and Marc Costanzo on guitar. They later fired Spicoluk due to him getting into too much trouble, and Costanzo left to form the pop band, Len. Richard "Twitch" Roy was the replacement bassist for Spicoluk before being fired for crashing the band's touring van on an East Coast Canadian tour. They changed their name from "Kaspir" to "Sum 41" for a supernova show. They then added Cone McCaslin to the lineup.
Besides Sum 41, Whibley developed a professional career in the music industry as producer and manager. Deryck was part of Bunk Rock Music, a music management and production company. He produced for No Warning with the company as well. Since parting ways with Greig Nori, he sold his part of the company in early 2005.