Here's what you need to know about Penny Knatchbull and her alleged relationship with Prince Philip including if they had an affair IRL or just on 'The Crown.'
Who is Penny Knatchbull Prince Philip s best friend in The Crown? cosmopolitan.com - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from cosmopolitan.com Daily Mail and Mail on Sunday newspapers.