"My mom's 80th birthday is coming up. I'm not able to say where yet, but it will be something to be remembered," Evan, 35, tells PEOPLE of how Diana plans to celebrate entering a new decade.

“Wishing Mamma and 'Mormor' a happy happy birthday ... her mother on her special day! The Swedish royal, 41, shared a post on Instagram Saturday to celebrate Queen Silvia's milestone 80th ...

As Jasper Carrott celebrates his 80th birthday on Friday ... "It was only when I took her to meet my mum and my mum said 'oh hello Bobby'. "I said 'well, that's my name, that's my real name ...