Technically she was but more of an uncommon commoner since her daddy was a nobleman.
https://www.biography.com/royalty/was-princess-diana-a-commoner-before-marrying-prince-charles
https://www.biography.com/royalty/was-princess-diana-a-commoner-before-marrying-prince-charles
I’m half Brit by ancestry but I think all this royalty crap is a ridiculous anachronism and should have been abolished long ago, but especially after they lost their empire. The UK is a pathetic pc $h*thole now, I now refer to it as cuck island.