Actress Seo Woo who is currently starring as Hyosun in the popular drama Cinderella's Sister showed off an entrancing posse as a ballerina. In an upcoming episode of the drama that will be aired on the 15th, Seo Woo will wear official clothing and transform into a professional ballerina.  It has been revealed that this actress will have a scene where she holds a ballerina performance where she dances along to the music Swan Lake. In the drama, Hyosun has always wanted to be a ballerina since childhood. Because of this, Hyosun has been spotted in plays many times performing these various ballerina techniques. Seo Woo has had experience with dancing in real life and showed very good skills as she perfectly acted out the role of Hyosun. With her lovely pink ballerina outfit and elegant dance gestures, Seo Woo received awe from staff members for her posse. Meanwhile, Cinderella's Sister had its greatest viewership rating on the 4th episode with 18.0% and is currently the number one Wednesday/Thursday drama. [gallery]