Margaret Ann Loesch (born 28 March 1946) is an American former President and CEO of Discovery Communications and Hasbro Inc's joint venture television network, Hub Network who also served as Executive Vice President of  Hanna-Barbera Productions  and President and Chief Executive Officer of  Marvel Productions.
She is the former President and CEO of Discovery Communications and Hasbro Inc's joint venture television network, Hub Network. In 1979 she moved to Hanna-Barbera Productions as Vice President for Children's Programming, moving up to Executive Vice President. In 1984, she joined Marvel Productions as President and Chief Executive Officer. 
