Mary Kate's $13.5 Million Pad Will Get a $3 Million Renovation

Even though the wedding of Mary Kate Olsen and Olivier Sarkozy must have been low-key, their New York City home is not. The couple has called upon architect Steven Harris to make their $13.5 million dollar pad even more elaborate. The $3 million project includes a 396-square-foot extension to the mansion that already boasts a ballroom, a hall of mirrors, and 5 bedrooms. Family planning, anyone?