A number of familiar faces from American Idol will be joining today's huge Hope for Haiti Now telethon. The telethon, which starts at 8pm EST, will be broadcast on just about every major network: ABC, CBS, NBC, FOX, CNN, BET, The CW, HBO, MTV, VH1, CMT, PBS, TNT, Showtime, COMEDY CENTRAL, Bravo and E!. You can also watch the telethon right here on BuddyTV.

Joining seemingly every gigantic celebrity alive--we're talking George Clooney and Madonna sized celebs--will be former Idol contestants David Archuleta, Katharine McPhee, and Jennifer Hudson. Jennifer is scheduled to showcase her Oscar winning pipes during the telethon, while Archie and McPhee are doing their part by answering phones and taking donations. David confirmed this last night via Twitter.

Tonight's telethon isn't the only way that American Idol is pitching in to help Haiti, at the request of British Prime Minster Gordon Brown, head Idol judge Simon Cowell is producing a charity single that will benefit relief efforts. No word yet if any former Idols will participate in that single, seeing that it's a project from across the pond, it's more likely that Cowell's X Factor proteges will be a part of it.

Be sure to tune in tonight to the Hope for Haiti Now Telethon and donate what you can. If any of you happen to get David Archuleta or Katharine McPhee on the phone when you do donate, be sure to share your story here in the comments.

(Image Courtesy of FOX)