Harry has previously said he thinks his late mother would have gotten along well with Markle.

\"Oh, they'd be thick as thieves, without question. I think she would be over the moon,\" Harry said in an interview with the BBC shortly after the couple announced their engagement.

Photos: PHOTOS: Prince Harry and Meghan Markle's royal wedding

He added that he thinks his mom \"would have probably been best friends ... best friends with Meghan.\"

Markle added: \"She's with us.\"

Moreover, the couple paid tribute to Diana with Markle's wedding ring, which includes diamonds from the late princess' jewelry collection.

\"The little diamonds [on] either side are from my mother's jewelry collection to make sure that she's with us on this ... on this crazy journey together,\" Harry told the BBC of the engagement ring.

\"PHOTO:
Reuters
PHOTO: Prince Harry and Meghan Markle kiss on the steps of St George's Chapel in Windsor Castle after their wedding in Windsor, Britain, May 19, 2018.
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