Johnny Depp apologises to jury for vulgar language he used in messages to describe Amber Heard

He said that led him at times to write text messages that he now finds embarrassing, and he apologised to the jury for the vulgar language he used in text messages introduced as evidence to describe Heard.

"In the heat of the moment, in the heat of the pain I was feeling, I went to dark places," he said.

But he said he'd been waiting for six years to tell his side of the story after Amber Heard filed for divorce against him in 2016 and sought a restraining order against him.

Read more: Johnny Depp rejects 'heinous' abuse charges, says he never hit ex-wife Amber Heard

The trial began more than a week ago, but, prior to Tuesday, jurors had only seen the Hollywood star sitting silently with his team of lawyers as each side has tried to embarrass the other in a trial that Heard's lawyers accurately predicted would turn into a mudslinging soap opera.

After denying Heard's abuse allegations, Depp spoke at length about a childhood in which physical abuse from his mother was "constant." When he became a father, Depp said, he made sure his children didn't experience that kind of upbringing.

Depp will continue his testimony Wednesday. In Tuesday's session, he testified primarily about the early years of his relationship with Heard, saying she seemed "too good to be true" at first.

Johnny Depp, 58, said he was cognizant of the age difference between him and Heard, 35.

"I acknowledge the fact I was the old, craggy fogey and she was this beautiful, creature," he said.

But Depp said that within a year and a half, it was as if Heard had become another person.

So far, Depp's friends, family and employees have testified that Heard was the aggressor in the relationship, physically attacking him on multiple occasions. Heard's former personal assistant testified that Heard spit in her face in a fit of rage.

Amber Heard's lawyers have said Johnny Depp physically and sexually assaulted her on multiple occasions, often in situations where he drank so much he later blacked out.

Read more: Amber Heard and Johnny Depp engaged in mutual abuse, testifies couple's former therapist

Depp said Heard's allegations of his substance abuse have been "grossly embellished" and that there have been no moments where he's been out of control.

The actor said he was addicted to pain medication, which stemmed from an injury on the set of the fourth Pirates of the Caribbean movie. He also said he took his mother's "nerve pills" when he was a kid.

But Depp said he detoxed from the pain medication and has experienced long periods of sobriety over the years.

The lawsuit itself is supposed to be over whether Heard libeled Depp when she wrote a 2018 op-ed piece in The Washington Post about domestic violence. In the article, Heard referred to herself as a "public figure representing domestic abuse."

She never mentioned Depp by name, but Depp and his lawyers said it was a clear reference to accusations Heard made in 2016 when the couple divorced and she sought a restraining order against him.

Heard's lawyers, who have filed their own countersuit against Depp, said nothing in the article libels him. They say the abuse allegations are true, and that the damage to Depp's reputation _ which he says got him booted from the lucrative Pirates of the Caribbean' movie franchise _ came from his own bad behavior.