Reuters reports the deal, expected to close by the end of the year, would give AT&T control of cable TV channels HBO and CNN, film studio Warner Bros and other coveted media assets. It still needs approval from the U.S. Justice Department.
AT&T also said that Lori Lee will lead AT&T's international business in addition to her responsibilities as global marketing officer.
The three executives will continue to report to AT&T Chief Executive Randall Stephenson, AT&T said.
A source told Reuters earlier this month that AT&T would run its wireless and DirecTV satellite television businesses separately from Time Warner Inc's media assets following its acquisition of the entertainment group.