i am number four cast

 John Smith (Alex Pettyfer) is an alien from the planet Lorien. He was sent to Earth as a child with eight others to escape the invading Mogadorians, who destroyed Lorien. Here, John is protected by a Guardian, Henri (Timothy Olyphant), and has developed "legacies", including enhanced strength, speed and agility, telekinesis and the power to transmit plasma light through his hands.
The Mogadorians, led by the Commander (Kevin Durand) learn about the nine children and come to Earth to find them. The Loriens can only be killed in sequence; Number One through Number Nine, though, and three of them are already dead, with John being Number Four. Knowing this, he and Henri move from a beachside bungalow in Florida to an old farm in Paradise, Ohio, where John befriends conspiracy theorist Sam Goode (Callan McAuliffe) and a dog which he names Bernie Kosar. He also falls for an amateur photographer, Sarah Hart (Dianna Agron). Her ex-boyfriend, football player Mark James (Jake Abel) is a bully who torments both John and Sam. watch more