The 46-year-old actor is best known for playing Mini-Me in the second two "Austin Powers" films.
Troyer suffered the seizure while attending the Heart of Texas Comic Con in Waco. His representative said that he was taken to the hospital as a precautionary measure, The Hollywood Reporter said.
His test results came back normal, and he is currently doing fine, the representative added.
"Everything is ok, guys. Thanks for the concern," Troyer tweeted after the incident.
He also had a role in 2008's Mike Myers comedy "The Love Guru" and appeared on 2005 reality show "The Surreal Life".