The blazing row that finally sent Johnny Depp and Amber Heard ’s ­marriage down the pan was over a pile of poo found in their bed.

Depp accused his wife and her pals of deliberately soiling the sheets after a violent row – sparked by him arriving two hours late to her 30th birthday party in April 2016.

She says the excrement was left by Yorkshire terrier Boo, who has bowel problems.

Johnny had stormed out of the LA penthouse during the argument and a housekeeper found the soiled sheets the next day.

The worker suggested the faeces were too big to be from their dog.

(Image: FilmMagic)

(Image: GC Images)

A source close to Johnny, 55, said he thinks there is “strong, photographic evidence that connected Amber to the faeces” and it was left as a “prank”.

But a representative for the actress told the Mirror: “Boo has some serious bowel control issues. There was never a joke, it wasn’t something done to be disrespectful.

“It was an innocent thing, it’s what pets will do. We don’t have anything else to say. Ms Heard is moving on and we do not want to engage in this nonsense.”

A month later, in May 2016, the couple had another row about the poo. It was during this that Amber alleges Johnny threw her mobile phone at her, hitting her in the face. Two policemen who attended the scene have since claimed in legal papers there were no marks on her face.

(Image: PA)

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Amber, 32, hinted at the bizarre row when she filed for divorce. She got a temporary restraining order, claiming Johnny made “paranoid and irrational accusations about some delusional idea”.

She alleged that during the row: “He began obsessing about something untrue and his demeanour changed dramatically. He became angry.”

Amber withdrew the request for a restraining order when their divorce was settled.

Johnny denies domestic violence. A representative did not respond to requests for comment.

The couple’s dogs, Pistol and Boo, hit headlines in 2016 when they were smuggled into Australia while Johnny was shooting the fifth Pirates of the Caribbean film there.

He and Amber filmed a bizarre apology. She got custody of both dogs when their divorce was settled in January 2017.