Actress/singer is 'thrilled' to be joining the cast, which is also rumored to include Mischa Barton and Heather Locklear.By Jocelyn Vena Ashlee Simpson-Wentz Photo: Tiffany Rose/WireImage Ashlee Simpson-Wentz has confirmed to MTV News that she will be taking up residence on the revamped "Melrose Place" this fall. "I'm thrilled to be joining the cast of 'Melrose Place' and look forward to being a part of its new generation of residents," Simpson-Wentz said. Although she didn't comment on what role she will have on the show, reports from The Hollywood Reporter and EW.com have the onetime "7th Heaven" star playing Violet, a small-town girl who is very manipulative and uses her girl-next-door charm to get what she wants.