Kellner was chairman and CEO of Turner Broadcasting System, Inc., a division of Time Warner which includes TBS, TNT, and Cartoon Network from 2001 to 2003.
[3] In 1986, he was the first executive hired by Rupert Murdoch and Barry Diller to develop a fourth television network to compete with the big three.
[4] Among the shows that emerged during Kellner's seven years at Fox were The Simpsons, Married... with Children, Beverly Hills, 90210, Melrose Place and In Living Color.
During his tenure, Kellner began by championing urban sitcoms, but eventually steered The WB in the direction of teen and family-oriented dramas.
7th Heaven, Buffy the Vampire Slayer, Gilmore Girls, Dawson's Creek, Felicity and Charmed all premiered during Kellner's presidency.
This left WCW without a television contract, and hastened its eventual purchase of assets by WWF chairman Vince McMahon.