On January 21st, 2015, Kevin Hart bought out two shows of The Wedding Ringer in a theater near Toledo, Ohio. He then urged his fans to "tell them Kevin Hart sent me." 500 patrons were then treated to a free showing of The Wedding Ringer.
When Josh Gad and Kevin Hart crashed the wedding, the best man (Josh Peck) yells out Wolverines. Josh Peck played the title role in _Red Dawn_ (2012) where he was the leader of group of teenage insurgents named after their football team called the Wolverines.
Before the movie ends, Lurch says he has a bad feeling about this flight. Which is ironic because Jorge Garcia who plays Lurch also played Hurley on the show Lost. Which was about people being in a plane crash and stranded on an island.
In the family lunch scene, kevin hart's character 'bic' says; "I remember when I was sucking d*ck for money...". This line came from his stand-up comedy show 'Laugh at my pain' (2011), in which he said his cousin did do that.
The trivia items below may give away important plot points.
At the end of the movie when Doug and Jimmy are flying to Cancun with all the other fake groomsmen plus Nadia and others, Jorge Garcia's character says the last line of the movie "I have a bad feeling about this flight". Jorge Garcia had previously starred in the successful television series Lost (2004)where a plane crash lands on an island.
Kevin Hart's character states to Josh Gad that Father McNulty, who is scheduled to perform the ceremony, would recognize Jimmy Callahan as an impostor because the Father was the principal at the Benjamin Rush school. There is a real Benjamin Rush school in Northeast Philadelphia where Hart attended George Washington High School. In addition, Benjamin Rush, a founding father, was born in Kevin Hart's hometown of Philadelphia, Pennsylvania.