Actor Jason Priestley was hospitalized Monday after he was thrown off of a horse on the set of his show "The Code."

Priestley updated fans on his health on Wednesday via Twitter and thanked them for their well wishes.

"Hey guys, thanks for all the kind words... It's true, I did get thrown off a horse on set... I got my bell rung pretty good," he wrote. "Because I have a history of concussions, they took me to see a neurologist for an assessment. He advised I take a few days off as I had suffered a concussion... But I am definitely on the mend and looking forward to getting back to work with all the wonderful people on The Code."

According to TMZ, the actor stayed in a hospital overnight.

In 2002, Priestley fractured his spine and suffered a concussion during a race car crash in Kentucky.