* BillingDisplacement: The posters for the film ran with the bridesmaids theme, depicting all five of them (plus the bride) which was why Chris O'Dowd (Officer Rhodes) doesn't appear, despite playing a more important character than Wendi [=McLendon=]-Covey (Rita) or Ellie Kemper (Becca).
* FakeAmerican / FakeBrit: Australians Rose Byrne and Rebel Wilson play an American and a Brit respectively. Averted with Irishman Chris O'Dowd.
* NamesTheSame: The name of Lillian's husband-to-be is Doug(ie), like the groom in the first ''[[TheHangover Hangover]]'' movie.
* RealitySubtext: This was Jill Clayburgh's (Annie's mom) last film, as she was secretly fighting leukemia.
* RealLifeRelative: Ben Falcone, who plays Air Marshall Jon, is married to Melissa [=McCarthy=] (Megan.)
* RetroactiveRecognition: For RebelWilson.
* StarMakingRole: While Melissa [=McCarthy=] isn't that unknown, she was primarily a television actress before this movie. Her film career and star status skyrocketed after this and hasn't stopped since.
** Rose Byrne gained a lot more attention after appearing in this and broke into increasingly bigger pictures.
* WhatCouldHaveBeen: Melissa [=McCarthy=] based her character after Guy Fieri and was able to wear many costume pieces that referenced him, but she wanted to physically transform into him, all the way down to his hair.