Heather Mills, the estranged wife of former Beatle Paul McCartney, has joined the next group of celebrities who will hit the ballroom on the latest season of ABC “Dancing With The Stars.”

The thirty-nine year old former model turned social activist lost her left leg below the knee in a traffic accident and will be the first contestant on the show to compete with an artificial limb, ABC said.

The “Dancing” lineup will also include will be world female boxing champion Laila Ali, the daughter of Muhammad Ali, country music star Billy Ray Cyrus, former ‘N Sync boy band member Joey Fatone, Olympic speed-skater Apolo Anton Ohno, former basketball star Clyde Drexler, TV-radio host Leeza Gibbons and Vincent Pastore, who appeared on “The Sopranos.”

The cast for the upcoming fourth season of “Dancing,” which premieres on March 19 and was announced on ABC’s “Good Morning America” program.

During its fall 2006 run, “Dancing” ranked as the most watched unscripted show in U.S. primetime, and No. 2 overall, averaging 20.7 million viewers a week.