Mary-Kate and Ashley Olsen have added shoes to their ever-growing empire. The duo have partnered with shoe company Steve Madden Ltd. to create a line of footwear.  The shoe range will be added to their already successful Elizabeth and James line. Mary-Kate says in a statement as quoted by People magazine, "We are excited to partner with Steve Madden to create the new Elizabeth and James footwear line."

The new shoe line is expected to hit high-end stores in mid-2009.  Source