Marty Adelstein, a partner in the 6-year-old talent agency Endeavor, is leaving to become a manager and set up his own entertainment company.
His clients, who include TV series creators David E. Kelley (''Ally McBeal") and Bonnie and Terry Turner (''That '70s Show'') and wrestling-star-turned-actor The Rock, will remain at Endeavor and be co-represented by Adelstein.
Adelstein, 43, said he is trying to put together a business plan and raise financing for a multi-faceted entertainment company.
He began his career in 1982 in the William Morris Agency mailroom. Before joining Endeavor in 1995, four months after it was founded, he had worked as an agent at Creative Artists Agency, United Talent Agency and its predecessor company, Leading Artists.