<Li> David Krumholtz as Michael Eckman, a geek who assists Cameron in his quest to woo Bianca, and in the process tries to woo Kat's friend Mandella . </Li> <Li> Susan May Pratt as Mandella, Kat's only close friend and an aficionado of William Shakespeare, who ends up going to the prom with Michael . </Li> <Li> Gabrielle Union as Chastity Church, Bianca's best friend, who betrays Bianca by going out with Joey when Bianca spurns him . </Li> <Li> Daryl Mitchell as Mr. Morgan, teacher of Kat, Patrick, and Joey's English class . </Li>

Who plays chastity in 10 things i hate about you