Ernesto Valentino Dimperio, who plays Bobby in the film, was actually 21 during principle photography. His character was supposed to be 13.
The alien was actually played by three separate actors. Up until Agent Cole and Agent Anderson show up to the house, Killian Anderson portrays the extra-terrestrial visitor. For the remainder of the film, JC Castro mainly plays the alien. Bren Anduze plays the alien in one shot: a shot done weeks after filming.