Yentl with Barbra Streisand, Jewish girl dresses and passes as a guy so she can study the Talmud. (I've never seen that movie but seems to be good).
Pope Joan with Johanna Wokalek, she passes as male to become a monk and finally ends up being a pope. (I've watched this movie with my parents, it's somewhat cheasy but the costumes and the medieval Rome scenery is good so watch it on a big screen or not at all)
Both are dramas.