She’s the queen of rap and he’s related to British royalty.

But the unlikely pairing of Nicki Minaj and Princess Diana’s nephew Louis Spencer seemed like a match made in heaven when they met at her London concert on Saturday.

The 32-year-old beauty revealed the late royal’s relative had jokingly asked her to marry him after they chatted backstage at the O2 Arena.

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Brush with British gentry: Nicki got friendly with Princess Diana's nephew Louis Spencer after her gig at London's O2 Arena on Saturday

Nicki shared a cheeky snap of her posing alongside Viscount Althorp, who is the eldest son of Charles Spencer, Diana’s brother.

‘The Royal Family stopped by. @louisspencer Nephew of Princess Diana – he said he wants to marry me #LONDON #ThePinkprintTOUR (sic)’, the Starships hit-maker joked on Instagram.

The accompanying photo sees the hip-hop bad girl cosying up to the handsome 21-year-old.

Keeping it in the family: The 32-year-old rapper was also delighted to meet Louis' sister Lady Kitty Spencer

Clad in a see-through black top through which her bra is clearly visible, Nicki’s racy attire probably wouldn’t go down well in the Spencer household.

Nicki followed up with another picture, captioning it, ‘Check out our wedding photo. no honestly it was such an honor to have you guys.’

She also posted a shot with the handsome artistocrat’s sister Lady Kitty Spencer, writing, ‘His beautiful sister @kittyspencer8 #LONDON #ThePinkprintTOUR’.

The Princess of Wales’ family have managed to fly under the rader since she passed away in a car crash in Paris on 31 August 1997.

Nicki’s rapper beau Meek Mills needn’t worry, however, since the curvy chart-topper is smitten with her man.

He flew out to support her at her Paris gig and the pair posed for a series of racy Instagram pics backstage.

Sorry, she's taken: Nicki is smitten with her rapper boyfriend Meek Mills, who recently surprised her in Paris