Jeremy Renner grabbed the mic to apologise to guests after the cast gatecrashed the wedding. Picture: Screengrab/YouTube

The cast of the comedy Tag have been playing a cross-country game to promote the film.

Based on a true story, Tag tells the story of how far some guys will go to be the last man standing. Every year, for one month five highly competitive friends hit the ground running for a no-holds-barred game of tag, and this year, game coincides with the wedding of the only undefeated player. 

Last weekend, the game was in full swing at the Fontainebleau Miami Beach hotel, when the cast unexpectedly crashed into a wedding reception at the hotel during the Best Man speech.

Jeremy Renner grabbed the mic to apologise and explain, when the rest of the cast, Jon Hamm, Ed Helms and Jake Johnson, busted into the reception hot on his tail.

The newly married couple and their guests loved the surprise, and the actors called a time-out to take pictures with the happy couple.

Tag is set for release in South African Cinemas on 29 June 2018.