At the 2015 Golden Globe Awards, Kevin Hart went on record saying this film was his best work to date and is most representative of his work on-stage as a stand-up comedian.
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.
Early in the film when Doug (Josh Gad) falls through the desk he yells out, "I can't feel my **** legs!" In Frozen (2013), Olaf (also voiced by Gad) yells, "My legs! I can't feel my legs!".
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 Kevin Hart: Laugh at My Pain (2011), in which he said his cousin did do that.