But Heard insists that May 21 was not an isolated incident.
Heard said that Depp had turned up late to the gathering at their Broadway home 'inebriated and high'.
Johnny Depp allegedly attacks Amber Heard, the day after his mother died, throwing her cellphone off her face.
Heard phones the police, who found 'no evidence of any crime'.
The Oscar-nominated actor had just ended his relationship with French model and actress Vanessa Paradis after 14 years together and two children - daughter Lily-Rose, now 17, and a 14-year-old son John who goes by Jack.