VANCOUVER -- Hundreds gathered in Vancouver to welcome the return of Marc Emery, Canada's self-styled "Prince of Pot," after he spent more than four years serving a prison sentence in the U.S.

The welcoming ceremony took place Sunday at Victory Square, not far from the Cannabis Culture store in the Downtown Eastside that bears his name.

Raucous cheers and clouds of pot smoke greeted Emery as he arrived at the park.

Emery did not waste any time getting into campaign mode.

The 56-year-old immediately started talking about the upcoming 2015 election, and threw his support behind Justin Trudeau's federal Liberals.

"Oct. 19 is legalization day," said Emery. "We just all have to show up."

"This is the most historic election for our culture because never before has legalization been on the ballot," he said.

"We've got 14 months to turn this country into a non-stop discussion about why we ought to legalize marijuana."

Emery has been a supporter of the Liberals since Trudeau voiced his support for the legalization of marijuana, and Emery's wife, Jodie Emery, has said she wants to run for the party in the election expected next year.

For many gathered at the event, Emery's return was a landmark event.

Brandon McCreath, 32, said it would add much-needed momentum to the pro-legalization movement.

"I think it's great, I think it's galvanizing the community," he said. "I think having Marc back, it's kind of bringing people back out of the woodwork."

"People that maybe normally wouldn't attend certain rallies such as this, they're coming out."

Melissa Zorn, a 23-year-old marijuana activist, said the movement was not just about legalizing pot, but about individual rights.

"Marc fights for marijuana but he also fights for a cause in general, which is freedom," she said.

"It's not just about getting stoned," said Zorn. "The message is freedom of choice."

In 2010, Emery was extradited to Seattle and he pleaded guilty to selling marijuana seeds from Canada to American customers. He was sentenced to five years but was released early for good behaviour and crossed into Canada at Windsor, Ont., on Aug. 12.

Emery has said he has been arrested 28 times for what he called marijuana civil disobedience, with his just-completed sentence being the latest. He has said he plans to go back to work at the Cannabis Culture store and will continue his activism even if it means more arrests.