If you thought the all-star line up of Heirs couldn't get any more jam-packed, you thought wrong. Girl idol group f(x)'s Krystal has just been confirmed to have joined the cast of the new drama. The project has already confirmed big names such as Lee Min-ho, Park Shin-hye, and Kim Woo-bin. Heirs, set to air this fall, tells the story of a group of extremely wealthy high schoolers and the relationships (read: drama) between them. Krystal is set to play the character of one of the upper tier kids, portraying a bubbly heiress. Considering her well-known persona as an "ice princess," it will be interesting to see her shed the image for something more light-hearted. Acting alongside school-based drama veterans Lee Min-ho and Kim Woo-bin; do you think Krystal will be able to keep up?