The answer is they all visited Middleton Grange Shopping Centre and got a great reception when they got here.
Queen Elizabeth II, Princess Anne, James Martin, Jeff Hordley, Jonty Hearnden, and Barbara Knox all share the honour of meeting the great people of Hartlepool.
Were you in the picture with these and more? Have a look through our feature and find out more.
5. Keeping up the Corrie connection
Coronation Street star Margot Bryant, famous for playing the character Minnie Caldwell, was pictured with Annie Melcalf (right), on the day Woolworths opened in the Middleton Grange Shopping Centre in 1970. Photo: hm
6. The Emmerdale connection
Emmerdale star Jeff Hordley got a huge welcome when he was in the shopping centre at Christmas in 2004. Were you there and did you get to meet the man who plays Cain Dingle in the soap? Photo: TC
7. A big royal occasion
Princess Anne was almost obscured when she was pictured as she opened the Middleton Grange Shopping Centre. Photo: Hartlepool Mail
8. A big welcome for a star from Big Brother
It was Christmas in 2005 when Anthony Hutton visited the shopping centre to help with a draw for a competition to win a car. Months earlier, Anthony won the fifth series of Big Brother. Photo: LH