The Walking Dead has joined forces with the Red Cross to organize a blood drive.

In a promo for the blood drive, AMC’s hit show has zombie-fied a number of celebrities — including The Hobbit director Peter Jackson, Dexter alum Jimmy Smits, Extra correspondent Maria Menounos and The Black Keys’ Dan Auerbach and Patrick Carney — in order to drum up awareness for the cause. If you donate, you’ll be signed up to win a trip to the set when filming starts up for season 4.

So, use your brains and get giving! Check out the promo below:

The blood drive will run through Oct. 22. The third season of The Walking Dead premieres on Oct. 14.

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