Jason Priestley is in Oakville, Ont. today, helping Tim Hortons whittle down a list of doughnut flavours dreamed up by the Canadian public.

The Vancouver-born actor will help the restaurant chain choose an eight-pastry short list from one month's worth of entries from their "Duelling Donuts" contest.

Priestley appeared in an episode of the sitcom How I Met Your Mother last February where he claimed he had invented "The Priestley," a strawberry-vanilla doughnut with a chocolate Timbit nestled inside.

The episode played on the idea of a Canada obsessed with Tim Hortons, where Priestley imagined an ideal doughnut. He was interviewed for a faux documentary where he bragged about "The Priestley."

Tim Hortons then made a mock batch of the fictional pastry.

"My Tim Hortons dream doughnut became a reality, and now another lucky Tim Hortons fan could see theirs come to life too," Priestley said.

Priestley is best known for his role on Beverly Hills, 90210.

The contest winner will receive a $10,000 grand prize.

Canadians can vote for their favourite doughnut online, beginning Aug. 5.

With files from the Canadian Press