Canadian actor Dan Aykroyd, the grand marshal of the Honda Indy Toronto, said he was pulled over for speeding on his way to the race.
Aykroyd drew laughs when he said he had been stopped Sunday as he was "racing to the race."
"You know when you see these races, you want to get into your vehicles and drive home and you do it trying to imitate the driver. That won't be me this afternoon," said the 59-year-old actor, adding the police officer let him off with a warning.
The Ottawa native, who was an original cast member of Saturday Night Live and famous for movies such as Ghostbusters and The Blues Brothers, also proposed changing the traditional race intro "Gentlemen, start your engines" to "Drivers, start your engines."
Two women, Ana Beatriz and Danica Patrick, were among the competitors.
Aykroyd is a member of the Order of Canada and has also been inducted into Canada's Walk of Fame for his contributions to the entertainment industry.