1. In some of the great hall scenes in the first two Harry Potter films, the food on the table had been left out for days, meaning the entire cast had to pretend they weren't sitting in front of tables of stinky rotten food.
2. In Hunger Games: Catching Fire, Jennifer Lawrence had to eat a raw fish.
3. In The Revenant, Leonardo DiCaprio was concerned that the faux bison liver prepared by the prop department didn't look realistic enough. So, what did he do? Volunteered to eat the real, uncooked thing.
*Viewer discretion advised*
View this video on YouTube
4. And Leo powered through after a glass shattered and cut his hand during his big scene in Django Unchained, resulting in a very intense scene.
*Viewer discretion advised*
View this video on YouTube
5. Because Titanic had a really gruelling filming schedule, the stars had to use the bathroom in shifts, but Kate Winslet revealed that she just peed in the water tank from time to time.
6. That wasn't Kate's only run-in with water – during the filming of Eternal Sunshine of the Spotless Mind, she fainted after spending ages sat in hot water during the sink scene.
7. In Pretty Woman, Vivian was meant to find I Love Lucy really funny. But Julia Roberts didn't seem to find it all that hilarious, so the film's director ended up tickling her feet off-screen to elicit that authentic laugh.
*Viewer discretion is advised*
View this video on YouTube
8. When she was filming Red's parts in Us, not only did Lupita Nyong'o stay in character for the whole day, but she isolated herself and maintained Red's unique voice the entire time.
9. In Willy Wonka and the Chocolate Factory, about a third of the sweets were edible. Gene Wilder was well aware of which third, but chose to take a bite out of his inedible wax teacup, cos why not?
10. We all know that Indiana Jones and the Temple of Doom had that one scene where there were loads of bugs. What you might not know is that Kate Capshaw had to take a valium to get through the sheer amount of bugs that were crawling through her clothes.
11. Tony Todd had his face covered and his mouth filled with real bees in Candyman, and he was paid a bonus for each sting he received.
12. Daniel Stern had originally thought that a fake spider would be used for the famous Home Alone scene, but was surprised with a real venemous tarantula when it came to filming.
13. For the 40-Year-Old Virgin, Steve Carrell decided to actually get his first ever chest wax on-screen, all for the sake of comedy.
14. After snorting so much fake cocaine on the set of Wolf of Wall Street, Jonah Hill ended up in hospital.
15. The iconic opening of The Sound of Music captured Julie Andrews frolicking around in the hills, a picture of elegance. What we don't see is the multiple times she faceplanted into the muddy grass after being swept up by the strong winds from the helicopter that was used to film the scene.
16. We all know that the chihuahua wasn't mauling Amy Poehler's actual chest in Mean Girls, so what was going on there? Well, Amy had a piece of cocktail sausage pinned inside her bra, and the rest is history.
17. And finally this bonus one – because it didn't actually happen on set, but I think it shows some serious dedication to the craft – Timothée Chalamet got up close and personal with a peach ahead of filming the famous Call Me by Your Name scene.
