The appointment follows the agency's UK comms campaigns for events including the Rip Curl Pro Search WCT and Rip Curl's UK flagship store launch in 2009.
The agency specialises in promoting action-sport, lifestyle and street-fashion brands. It has been appointed to promote Rip Curl and its products throughout the UK's media.
Coffin on Cake will promote the brands history in surfing and its team of athletes, which includes the current men's and women's surfing world champions. The agency will also promote upcoming events and Rip Curl's seasonal ranges of fashion products.