CNN Worldwide President Jim Walton said on Friday he is leaving the once-dominant cable news network, which has been plagued by low ratings in recent years.
Phil Kent, chief executive of Turner Broadcasting, will begin a search for a new president, the network said. Walton is departing on Dec. 31.
"CNN needs new thinking. That starts with a new leader who brings a different perspective, different experiences and a new plan," said Walton, 54, CNN's president since 2003.
Walton will be staying on to oversee presidential election coverage, allowing CNN time to search for a new executive who can then start with a clean slate at the beginning of 2013.