Movie posters have been around about as long as the medium of film itself.
In that time, they've gone from being basic, obligatory marketing tools to works of art in their own right, with the very best able to convey the feel and tone of a movie with a simple, striking image, selling people on something they may not have originally been interested in.
But despite the important role posters can play in a movie's marketing push, they're not always given the time, care or attention that they deserve.
Even the biggest companies are guilty of phoning it in with their posters, with Marvel's jam-packed Spider-Man: Homecoming one-sheet being endlessly mocked on Twitter and Fox's X-Men: First Class producing a series of disgraceful character posters, but being lazy is one thing, and making an accidentally hilarious mistake is another.
From bad Photoshop skills to poor compositing and even missing imagery, the amount of errors that sneak their way onto official, studio-approved (presumably) movie posters is genuinely shocking.
On the plus side, these errors are quite funny. The poster artist probably isn't laughing, but we definitely are...
10. Death At A Funeral (2010)
Having released in 2010, the American remake of the 2007 British comedy Death At A Funeral has got to be one of the quickest turnarounds for a remake ever.
This rushed time-frame evidently impacted the marketing department, who, in a serious anatomical error, forgot to provide James Marsden with a normal bodily component; his right nipple.
To be fair, they may have also forgotten his left nipple - being consistently bad is still being consistent, at least - but since it's covered by Chris Rock's arm, we'll never know. One of the great unsolved movie-poster mysteries!
A plot point in the film involves Marsden's character being given a hallucinogenic drug, which explains why the poster makes him look so thrilled to have a deformed body. Hell, he could be hallucinating three nipples. Or four.
Or, perhaps he looks so excited because Zoe Saldana's left arm appears to be reaching down to grab a load of his... well, we'll leave that to your imagination. Maybe the poster designer forgot to give him one of those, too.