. Chenery was portrayed by actress Diane Lane in the 2010 motion picture Secretariat , released on October 8, 2010. Chenery herself appeared in a cameo role in the film. [ 6 ] [ edit ] References ^ [ http://www.drf.com/news/penny-chenerys-life-unscripted ^ nl.newsbank.com ^ cs.bloodhorse.com - 2009-09-15 ^ Horse racing.about.com ^ Smith