Lorimar and Telepictures advanced their merger.

The signing of a definitive merger agreement followed approval by the boards of the two entertainment firms on the previously reported deal. Lorimar Chairman Merv Adelson and President Lee Rich will control a total of about 17% of the stock of the new Lorimar-Telepictures, which will be headquartered in Culver City. Telepictures Chairman Michael J. Solomon and four other top managers will control a total of about 5%. Adelson will be chairman and chief executive, with Rich joining Solomon and other Telepictures executives as members of an office of the president.