Meghan Markle says there were concerns within the British Royal Family about how dark her son's skin might be.
In a hotly-anticipated interview, she told Oprah Winfrey that they also didn't want Archie to be a Prince.
Prince Harry, meanwhile, says he has felt 'really let down' by his father - saying Prince Charles 'stopped taking his calls' at one point.
The interview was produced by Harpo Productions and CBS, and will air in Ireland on RTÉ 2 tonight.
It was aired in the US overnight, ahead of its broadcast in dozens of other countries.
Meghan and Harry have stepped down from their roles as senior royals, and are currently living in the US.
During the two-hour interview, Meghan says she was so unhappy as a senior Royal that she had suicidal thoughts.
She said: "I was ashamed to have to admit it to Harry.
"I knew that if I didn't say it, that I would do it - I just didn't want to be alive anymore."
She did things started to 'worsen' as soon as she and Harry married.
Speaking about her first pregnancy, she said: "In the months when I was pregnant, all around the same time, so we have in tandem the conversation of he won't be given security, he's not going to be given a title, and also concerns and conversations about how dark his skin might be when he's born."
She didn't say who exactly had that conversation - saying it would be "would be very damaging to them" - but added there were 'several conversations' with Harry about it.
On the subject of his relationship with his family, Prince Harry said he has a 'really good relationship' with his grandmother Queen Elizabeth, and they've spoken more over the past year than they have in many years.
However, he said there's a 'lot to work through' with Prince Charles as a 'lot of hurt has happened'.
He said he is making it a priority to heal the relationship with his father.
Harry said he also loves his brother William 'to bits', although added they were now on 'different paths'.
In terms of deals the couple has made with Netflix and Spotify, Harry said he'd been 'cut off financially' from the royal family in early 2020.
Meghan is pregnant with the couple's second child, and they revealed in the interview that they're expecting a baby girl.
The full interview is set to be broadcast on RTÉ 2 at 9:30pm tonight.
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