The next weekend they went to the movies on Queen St and saw My Favorite Brunette.
Mr Williamson could not remember if he had intentionally selected that film because of Mrs Williamson's hair colour but the date would become the first of many.
While the internet is the modern way of meeting new people, dance halls were the place to go when they were young, the couple said.
"It's changed dramatically because all we had to meet people was colleges but mostly we had dance halls on Saturday night. I haven't met anyone that's met online. I suppose it's all right but there's a bit of risk," said Mr Williamson.
About four years after meeting, Mr Williamson popped the question. There was no getting down on one knee, he simply said "let's get married next year".
The reply: "Oh yes, yes please."
"We had a little car and we went out to Bethells Beach and got engaged out there. It wasn't very romantic," Mrs Williamson said.
In 1951, aged 21 and 20, the couple got married at an Anglican church at the top of Khyber Pass. Mr Williamson wore a tail suit and gloves while Mrs Williamson wore a white dress with a train she made herself.
"She was pretty impressive, a beautiful girl. I don't know what else I can tell you," Mr Williamson said.
"Roy looked pretty handsome," Mrs Williamson said.
The best part of being with each other for so long is watching their family grow, Mr Williamson said.
The couple have four children, 13 grandchildren and 19 great-grandchildren.
"It's bloody good. They're all really good, we've had no heartache with them. But even if they weren't good citizens, you'd still looked after them if they were in jail," he said.
On the day of their 65th anniversary they went out for dinner with close family.
Their secret to a long marriage?
"Always be best friends," Mrs Williamson said.
"Patience for each other. You only have a few fights when you're younger but as you get on to your married life you just have discussions and see who wins the discussion," Mr Williamson said.
