Horler has been promoted to head of international media relations and will relocate to France.
He has held the top UK marketing role for more than seven years, responsible for delivering an integrated approach across all communication activities, to both consumer and B2B audiences.
Holler was responsible for all off-channel consumer advertising, marketing, TV listings and PR for Eurosport in the UK and also sat on the management board.
Eurosport will be looking for a direct replacement for Horler, although the position will revert to head of marketing and communications, rather than being board director level.
The Eurosport Group recently formed a partnership with Nintendo to offer 3DS owners a weekly series of free 3D video content, as the broadcaster looks to extend its audience reach.
Eurosport is watched in more than 123 million homes across 53 countries and has had more viewers than any other pan-European channel in each of the last 14 years.
Click here to read Marketing Week’s Eurosport cover feature, “Blood, sweat and tears”, featuring an in-depth interview with CEO Laurent-Eric Le Lay.