After a two year vacancy that created a one-block mini-blight on tony Madison Avenue, contemporary sportswear brand Milly will be taking over the former Sharper Image space at no. 900, just north of 72nd Street. Popular with everyone from the Gossip Girl cast to Second Lady Dr. Jill Biden, who wore a Milly ensemble to the Inauguration last year, the label has been something of a sleeper in the heavily hyped contemporary market. What Milly has lacked in advertising presence, however, it has more than made up by building a broad array of happy customers, and becoming a key player at high-end department stores. Look for the store to open early next year as designer Michelle Smith launches a new handbag and accessory collection for the label.