Teen screen star Ashley Olsen is using university to expand her acting knowledge too - she has signed up for drama classes. Olsen, 18, has been acting with twin sister Mary-Kate since she was a baby and they have both accumulated fortunes totaling $300 million from TV and movie careers. But Ashley, currently studying at New York University, accepts she still has much to learn. A source tells Star magazine, "(She) has secretly been attending a drama class two days a week at the prestigious William Esper Studio on New York's West Side." The class, which costs $295 a month, teaches the Meisner Acting Technique, which centers around students' exploration of spontaneity and improvisation.