Well that was a great first programme in the UK series of Who Do You Think You Are?
East Ender Danny Dyer, who plays the landlord of the Queen Vic in the BBC's Eastenders , discovered he was descended from Thomas Cromwell and Royalty including Edward III and there up to William the Conqueror. From the early research, into his more recent ancestors, it was not looking very positive with tales of relatives in and out of the workhouse and other hardships. Then suddenly, with the discovery of a gateway ancestor, the actor found himself related to nobility and finally the ultimate top of the social pile - the King of England! This article on TheGenealogist got it right. See: https://www.thegenealogist.co.uk/featuredarticles/2016/who-do-you-think-you-are/danny-dyers-cockney-and-royal-roots-371/