THOSE who don't like movie spoilers look away now - new blockbuster Iron Man 3 features a joke about Croydon.
No, we're not kidding. The American superhero film currently in cinemas features a gag about London's most populated borough.
So as not to completely spoil the surprise, we will not reveal what the joke is or who says it.
But the reference has proved a hit, with hundreds of fans taking to Twitter to express their surprise.
David Pashley tweeted: "Watched Iron Man 3. By far the biggest laugh was about Croydon. This may be location specific."
Cameron Smith posted: "Croydon getting a mention in a Marvel movie was a very welcome surprise. Also Iron Man is great, go see it."
Samuel A Gill said: "I missed the Croydon reference in Iron Man 3 while watching it at a Croydon cinema. Googled the quote and it was pretty cool."
The film, made by Walt Disney Studios, is based on the character by Marvel Comics.
Robert Downey Jr reprises his role as Tony Stark alongside co-stars Gwneth Paltrow, Don Cheadle and Jon Favreau.
