Savannah Miller: Sienna's Big Sister

Sienna Miller strolls around NYC’s SoHo and grabs a cup of coffee on Thursday with equally stylish big sister Savannah. (Below, Sienna, in a leopard-print scarf, and Savannah are pictured together out and about New York City on Tuesday.)

Savannah, a graduate of Central Saint Martins school of design, is the co-designer of the Miller sisters’ fashion line, Twenty8Twelve, which is in reference to Sienna‘s birthday, December 28. Pepe jeans owner Carlos Ortega is backing this endeavor financially.

The collection will reportedly hit Bergdorf Goodman and Neiman Marcus soon!