'Ray Donovan' actor Frank Whaley says Jon Voight 'slapped me across the face' on set

"Ray Donovan" actor Frank Whaley accused Jon Voight of slapping him on the set of the Showtime series in a tweet. The actor claims Voight "couldn’t keep up," so he slapped Whaley "across the face." According to Whaley, Voight denied the incident happened.