Zac Efron is becoming a serial killer.

FOX's Jacquelyn Karl explains:

Actor Zac Efron's signed on to star as Ted Bundy in a bio-pic about the serial killer. Both The Hollywood Reporter and Variety reporting Efron will play Bundy in "extremely, wicked, shockingly, evil and vile."

The movie's centering on Bundy's relationship with his girlfriend and will start shooting on Oct. 9. The movie being directed by Joe Berlinger, best known for the "Paradise Lost" series of documentaries. Bundy confessed to killing more than two dozen women and was executed in Florida in 1989.

Out later this month, Efron will start alongside Dwayne "The Rock" Johnson in the movie "Baywatch."

Jacquelyn Karl, FOX News.

Follow Jacquelyn Karl on Twitter: @Jacquelyn_Karl