William Shatner says he's excited to attend the Saskatoon Expo

William Shatner is beaming into Saskatoon for the Saskatoon Comic & Entertainment Expo on Sunday.

The 84-year-old actor's roles include Denny Crane, TJ Hooker, Dr. Edison Millford Goodson and Captain James T. Kirk (from the 1960s television series Star Trek. Shatner also starred in a number of movies based on the show).

Shatner said he's excited to see fans.

"We have a good time. I enjoy that a lot. I sign some autographs, posters and pictures, and then leave town usually with my tail up," Shatner said Monday ahead of the expo.

The Canadian actor said he never knew Star Trek would grow in popularity after it was cancelled in 1969.

"Six, seven years after we were cancelled they started talking about a movie," he said. "Then, we made one movie and it was too pretentious so they said that's it. We started making other movies ... and it went on and on."

You slowly began to realize how to perfect the technique and then by the time you're too old to use it you've discovered how to do it.- William Shatner

Not only has Shatner been in front of the camera for more than 50 years but he's starred on Broadway and Stratford Shakespeare Festival. He has stars on the Hollywood Walk of Fame and Canada's Walk of Fame.

Shatner said he hasn't enjoyed one role more than the others. He compares acting to riding competitively.

"You slowly began to realize how to perfect the technique and then by the time you're too old to use it you've discovered how to do it," he said. "I keep saying 'Oh that's how you do it.'"

Shatner discovered his love for horses after buying some land in southern California.

"It must have been lurking there in my childhood in Montreal and came to fullness when I had the means to buy a horse," said Shatner.

He learned to ride and now participates in equestrian competitions. He also runs the Hollywood Charity Horse Show. 

He says he is extremely proud he can use his celebrity status to raise money for charities.

"To be able to use it and encourage people to give to certain things, that's a creative way of using the celebrity," said Shatner.

He once sold a kidney stone for $70,000 to help build houses for people displaced by Hurricane Katrina.

Shatner will appear Sunday at the Saskatoon Comic & Entertainment Expo.

Fans will be able to attend a panel, get autographs and snap a photo with Shatner. People can pre-purchase photo-ops online.

Saskatoon Comic & Entertainment Expo will be held at Prairieland Park on Saturday and Sunday.