The script of the hilarious family film required the 24-year-old actress to hit her co-star Robert Hoffman (Ricky), and while you only see it happen once in the movie, there were actually multiple takes ... and therefore multiple slaps!
Ouch! Poor Robert!
"When you're in a relationship, stay strong," Ashley tells fans behind the scenes. "Don't let any guy push you around!"
Watch this exclusive clip of Ashley and Robert filming their slap scene in Aliens in the Attic, and check out more bonus features on the DVD of the extraterrestrial film -- including deleted scenes and a gag reel -- when it arrives in stores tomorrow, November 3!