Horn worked at
Norman Lear's television production companies,
Tandem Productions and
Embassy Communications, the latter of which he was chairman before becoming president of
20th Century Fox in October 1986, soon after it was acquired by
Rupert Murdoch. Horn was one of the founders of
Castle Rock Entertainment in 1987. There, he supervised films including
A Few Good Men (1992),
The Green Mile (1999),
When Harry Met Sally (1989), and the sitcom
Seinfeld (1989–1998). In 2017, he said of his professional success: I have this... theory that whoever is working in a job deserves to stay... unless they prove that they don't deserve to be in the job. On May 1, 2019, Horn was given the added title of chief creative officer (CCO) of Walt Disney Studios. In July 2022, it was reported that he would hold a position with
Warner Bros. Discovery. Starting August 1, 2022, Horn began serving as a business consultant during a transitionary period after the acquisition of
WarnerMedia by
Discovery, Inc. ==References==