The actor appeared to crash a wedding while filming Top Gear around London this week.
LeBlanc, a new presenter for the BBC car show, and stunt driver Ken Block shocked the entire wedding party when they stepped out of a tricked-out 1965 Ford Mustang in front of St. Paul's Cathedral. Block proceeded to do some stunts in the car on the cobblestone road outside the church.
Paul Bradbury, a witness at the scene, posted videos of the day's events on Twitter.
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The Friends star, 48, also shared some photos from his ride around London with Block.
Canary wharf is nice. pic.twitter.com/yaKXOAVETB— Matt LeBlanc (@Matt_LeBlanc) March 12, 2016
LeBlanc joined Top Gear earlier this year and will serve as the show's first ever non-British host in its 39-year history. The show's 23rd season, featuring LeBlanc, will premiere in May on BBC America.