Samantha McMillen said she spent “much of the afternoon and early evening” with Heard to help her prep for a December 2015 appearance on James Corden’s “The Late Late Show” — the day after the actress claimed she was headbutted during a “litany of violence” by husband Johnny Depp.

“I could see clearly that Ms. Heard did not have any visible marks, bruises, cuts, or injuries to her face or any other part of her body,” McMillen told the London court, where Depp is suing The Sun newspaper for calling him a “wife beater.”

McMillen — who was also Depp’s stylist — said she was too “confused” to know how to respond when the “Aquaman” actress said after taping the show: “Can you believe I just did that show with two black eyes?”

“Ms. Heard did not have any black eyes, and had been visibly uninjured throughout the day and at that moment,” McMillen said in a written statement.

Heard later posed for a photo, shown in court, that seemingly showed the injuries.

Similarly, McMillen said she “interacted closely” with the actress on May 24, 2016 — a few days after the actress claims her then-husband had flung a cellphone at her face in the last of his attacks.

She told the court she was at the house before Heard, who was not expecting to see her.

“There were no visible marks, bruises, cuts, or injuries to her face or any other part of her body,” McMillen said.

Three days later, McMillen told the court, the actress was photographed with “prominent injuries visible on her face” from the alleged attack, which Heard claimed happened before the stylist saw her.

“I was also aware that Mr. Depp left Los Angeles on May 22,” McMillen said, referring to the day after the alleged attack — and two days before she claimed she saw Heard with “nothing but her beautiful skin.”

“I therefore knew that Mr. Depp could not have caused those marks that Ms. Heard appeared with in court,” she testified.

McMillen had a “good working relationship” with the actress, though she “wouldn’t be on her speed dial” as someone she would likely confide in, she told the court.

She was challenged over her “loyalties” to the two stars, with a lawyer for The Sun suggesting she was there to “help” Depp.

“I don’t know what you are insinuating but I would not perjure myself for anyone,” she told the court.

“I’m obviously loyal because he’s kind and loyal back, but without any other reason than that,” she said of Depp.

“I would not commit perjury for any reason, for anyone — friends or family or anyone.”

Depp is suing The Sun over an April 2018 article that said he was a “wife-beater,” which he denies — and instead says his “sociopathic” ex-wife was the violent one in their marriage.

With Post wires