Glee was an unadapted book.
Amber Riley . She is best known for her portrayal of Mercedes Jones on the Fox comedy-drama series Glee ( 2009 -- 15 ) . Glee (TV series) . The initial twelve-member cast included club director and Spanish teacher Will Schuester ( Matthew Morrison ) , cheerleading coach Sue Sylvester ( Jane Lynch ) , guidance counselor Emma Pillsbury ( Jayma Mays ) , Will 's wife Terri ( Jessalyn Gilsig ) , and eight club members played by Dianna Agron , Chris Colfer , Kevin McHale , Lea Michele , Cory Monteith , Amber Riley , Mark Salling , and Jenna Ushkowitz .