Mary Ellen Moylan was born on 24 August 1925 in Cincinnati, Ohio, USA. She was married to Robert Stanley Bailes. She died on 28 April 2020 in Redmond, Washington, USA.
She performed in George Balanchine's choreographed Tchaikovsky's ballet, "Theme and Variations," with Tudor's choreographed Schoenberg's ballet, "Pillar of Fire," Petipa's choreographed Tchaikovsky's ballet, "Pas De Deux from The Sleeping Beauty," and Agnes De Mille's choreographed Aaron Copland's ballet, "Rodeo," in an American National Ballet Theatre production at the Royal Opera House in Covent Garden, London, England with Alicia Alonsgo, Igor Youskevitch, James Mitchell, John Kriza, Allyn McLerie, and Charlyne Baker in the cast. Alexander Smallens was choreographer.