Prince Harry and Meghan Markle will visit Princess Diana's grave before they get married later this year.

Prince Harry and Meghan Markle

Prince Harry and Meghan Markle

The 33-year-old royal is set to marry the American actress in May this year, but before they tie the knot, they are believed to planning one last trip to his mother's childhood home in Althorp, where she was buried after tragically losing her life in a car crash in 1997.

Harry and Meghan, 36, previously visited Althorp in November, where sources suggest Harry "quietly" asked his late mother for permission to pop the question to Meghan later that month.

A source told the Daily Star newspaper: "Harry has already taken Meghan to Althorp to see his mum, but they will go back before the big day. Harry wanted to take Meghan to see and speak to her ... it was very personal for Harry. I think he quietly asked his mum for her blessing to marry Meghan, too."

It comes after the flame-haired Prince admitted he believes the former 'Suits' actress and his mother would have been "thick as thieves" if Diana were still alive to witness him tie the knot with the beauty.

He said: "Oh they'd be thick as thieves, without question, I think she would be over the moon, jumping up and down, you know so excited for me. You know it is days like today when I really miss having her around and miss being able to share the happy news.

"But you know with the ring and with everything else that's going on I'm sure she's ... I'm sure she's with us yeah, you know, jumping up and down somewhere else."

Harry and Meghan are set to tie the knot at St George's Chapel inside Windsor Castle on May 19.

A reception for the couple will take place St George's Hall, after the pair originally wanted to host it at Frogmore House - where their engagement photos were taken - but were advised against it.

A senior royal source said: "They would have loved Frogmore for the party, particularly Meghan, who has called it 'dreamy', but they have been told St George's Hall is far more practical."