AMC and The Walking Dead have teamed up with the American Red Cross on a blood drive. Makeup FX artist (and Walking Dead co-executive producer) Greg Nicotero has “zombified” some celebrities to help spread awareness. These include: Peter Jackson, Jimmy Smits, The Black Keys, Maria Menounos, Elisabeth Rohm, Laird Hamilton, Joel Madden, Kurt Busch and Whitney Port.

The initiative includes a sweepstakes in which you can give blood and register for a chance to win a 3-day trip to The Walking Dead set during the filming of the fourth season. You can find the rules for that here.

AMC is sharing the photos on its site. Here’s Peter Jackson, Jimmy Smits and The Black Keys (browse the full gallery here):

More on The Walking Dead here.