Depp, 57, is suing NGN over a story published in The Sun in 2018 which branded him a “wife beater” – a claim which he strenuously denies.
Today in court, Amber was questioned about her friendship with former co-star Franco and technology mogul Elon Musk
A CCTV video of Heard talking with Franco in a lift was played in court.
The court heard the footage was taken on 22 May 2016 – a day after Heard alleges she was assaulted by Depp. She claims Depp threw a phone at her face in a row over a poo that was found in their bed.
Depp has denied assaulting his wife.
Eleanor Laws QC, for Depp, asked Heard whether she had cheated on her husband during their relationships.
She asked: “Were you having relationships with anyone during your relationship with him [Depp]?”
Heard replied: “No, not that that matters much. But no,” and the judge then asked: “You were not having a relationship with Elon Musk?”
Heard replied: “During my marriage to Johnny.”
Heard told the court she “wasn’t in communication with him [Musk] until 2016”.
A previous witness, Alejandro Romero, had claimed to have seen Musk visiting Heard at home prior to that date and Heard said of his testimony: “I believe he said it was before I moved in.
“I was not in contact with Elon until 2016.”
Ms Laws then asked if Depp’s jealousy was “illogical” and Heard replied: “All the jealousy can be deemed illogical.”
Ms Laws then played CCTV footage showing Heard taking actor Franco up to Depp’s apartment at 10.56pm on May 22.
Heard confirmed it was her and Franco in the lift, and told the court: “We were talking and he was saying: ‘Oh God, what happened to you?’
“He saw my face when I let him in. ‘What the f**k?’, is what he said to me.”
Ms Laws then asked: “Were you trying to be discreet and avoid being on the camera?”
Heard replied: “Yes, it was discreet.”
The actress has previously denied being romantically involved with Franco and she’s claimed she did not start dating Musk until after her split from Depp on 23 May, 2016.
Ms went on to read out text messages between Heard and Musk on May 22, 2016, in which the actress told Musk she was going to obtain a restraining order against Depp.
Musk offered to “arrange 24/7 security for you”, adding: “The offer would stand, even if you never wanted to see me again… anyway, sorry for being an idiot. The radio silence hurts a lot. It only matters because I really like you.”
Heard filed for divorce on May 23.
Depp has denied he was ever violent towards his ex-wife and has accused her of abusing him during their marriage.
Lawyers for NGN are defending their case based on Heard’s 14 allegations of abuse, which include claims of bust-ups between 2013 and 2016.
The actor has argued his ex-wife was abusive towards him during the marriage, which collapsed in 2016.