Phineas and Ferb Phineas and Ferb

Has True Blood vampire Bill Compton met his match in the Teen Wolf ? Yes, that's True Blood stars Anna Paquin and Stephen Moyer, along with Michael J. Fox, providing guest voices in an upcoming Halloween episode of Disney Channel's animated hit Phineas and Ferb.

In the segment "The Curse of Candace," Phineas and Ferb's older sister Candace catches the latest teen movie — a parody of the Twilight films. On screen, we see Moyer providing the voice of a vampire named Jared, while Fox shows up as Michael, a shirtless werewolf (shades of his iconic 1980s turn as the original Teen Wolf), as the two battle for the attention of Paquin's Kristen.

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Meanwhile, in the episode's other segment, "That's the Spirit," Michael Douglas provides the voice of zombies and a spooky pumpkin head, while his son Dylan Michael Douglas is the voice of a little boy who befriends Phineas and Ferb.

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The actors have children who are fans of Phineas and Ferb, and signed on thanks to that fact. The Halloween-themed episode premieres on Friday, Oct. 7 at 7 p.m. on the Disney Channel.

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