User blog comment:UFO Editor/Season 7 spoiler thread/@comment-1586735-20110320155029/@comment-392210-20110322001311

I really doubt it. Michelle Collins, Eddie Cibrian, Clare King and many, many others were all rumored to eventually appear on DH. Before season 5 premiered people were saying that Beyoncé was gonna be on the show, that she was gonna have a cameo appearance but she was hoping to become a series regular. As if that's something that happens, going from a cameo to a 20-episode stint just like that. Elizabeth Hurley is a big name too. Bigger than the first three people I mentioned. I don't see it happening.

The only rumor that turned out to be true was the one with John Barrowman. And that was backed up by Marc Cherry, who said he wanted to bring him in. And that only happened a year after it was first mentioned.

Marc Cherry is also yet to bring in Vanessa Redgrave and Sheryl Lee. He did say he wanted to have them guest starring on the show. :) I'd like that. Redgrave could had played Tom's mom (although Lois Smith did an awesome job).