Looking to branch out into television and motion pictures, Perenchio joined Norman Lear and Bud Yorkin in 1973 as a partner at Tandem Productions, and was made president and CEO. As part of the deal, Perenchio brought with him Alan F. Horn, a young Harvard Business School graduate whom he had recently hired away from Procter & Gamble in Cincinnati. In recruiting Horn, Perenchio wanted to bring someone new into the business, someone with an outside perspective that he could train. Within a few years, Perenchio made Horn president of Tandem and the two worked together from 1973-85 until the company and its parent company, Embassy Communications were sold to Columbia Pictures. Horn went on to become a prominent figure in the film industry; he co-founded Castle Rock Entertainment, was president and COO of Warner Brothers and currently serves as chairman of Walt Disney Studios.