Actor Johnny Depp grabbed his then-wife Amber Heard by the hair and repeatedly struck her in the face during a heated argument just a month after their marriage, her sister Whitney Henriquez said on Wednesday.

It is reported that Heard also punched Depp during a fight in March 2015 at their Los Angeles penthouse, Whitney Henriquez testified at the high-profile defamation case between the celebrity couple.

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Henriquez, a 34-year-old younger sister of Heard, said the “Pirates of the Caribbean” star sought to have her sign a non-disclosure agreement after the incident, but she declined to do so.

The 58-year-old Depp filed suit against Heard over an op-ed she wrote for The Washington Post in December 2018 in which she described herself as a “public figure representing domestic abuse.”

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Heard, who had a starring role in “Aquaman,” did not name Depp in the op-ed, but he sued her for implying he was a domestic abuser and is seeking $50 million in damages.

The Texas-born Heard countersued, asking for $100 million and claiming she suffered “rampant physical violence and abuse” at his hands.

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Johnny Depp denied ever striking Heard and claimed that she was the one who was frequently violent.

Henriquez testified on behalf of her sister on Wednesday. She had lived for a time in the same penthouse complex as Depp and Heard, and said the couple had a volatile relationship.

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“When he was sober things were wonderful,” she said. “When he wasn’t sober they were terrible.”

“If he was using or if he was drinking there was almost always a fight,” she said.

Depp filed the defamation complaint in the United States after losing a separate libel case in London in November 2020 that he brought against The Sun for calling him a “wife-beater.”

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Depp, a three-time Oscar nominee, and Heard met in 2009 on the set of “The Rum Diary” and were married in February 2015. Their divorce was finalised two years later.