So what's the deal with the spelling of the title? When asked, director Quentin Tarantino replied, "Here's the thing. I'm never going to explain that. You do an artistic flourish like that, and to explain it would just take the piss out of it and invalidate the whole stroke in the first place."
While auditioning in Berlin, Michael Fassbender inquired about playing the villainous Hans Landa. Tarantino shot him down immediately. He said, "Look, man, any guy that gets cast as Heathcliff is not f**king German enough to play my Landa, all right?"
Mélanie Laurent prepared for her role by working as a projectionist for a few weeks. She worked at the New Beverly Cinema, an establishment where Tarantino was a benefactor and now owner. Her final test was to screen Reservoir Dogs.
Actor Rod Taylor had a cameo as Winston Churchill in the film, but took the small role very seriously. He watched dozens of DVDs featuring footage of Churchill so he could get down his mannerisms and even his lisp. He nailed it, and it felt like we were actually in one of his secret war rooms.
Actor Til Schweiger who played Hugo Stiglitz was born and raised in Germany. He always refused to wear a Nazi uniform, even if it was just for a film. He agreed to don one in this movie, however, because he got to kill Nazis while doing so.
Mike Myers had a fun, small role in the film. He got the part after reaching out to Tarantino (who he was a fan of). He was excited to play this character because both of his parents had been in the British Armed Forces.
Those with good eyes may have noticed the Bear Jew's bat had several names carved into it. Those with even better eyes may have noticed they were Jewish names. One of those names on the bat was Anne Frank.
Eli Roth attributed two things to helping him get into the violent mindset of the Bear Jew. The first was the historically accurate wool underwear they all wore onset. The other was his girlfriend secretly adding Hannah Montana songs into his iPod.
Remember the film-within-a-film, Nation's Pride? That was actually directed by Eli Roth. They shot it over three days using 180 camera setups, and the final product clocks in at five minutes and 30 seconds.
Tarantino initially thought that Diane Kruger was an American since her most well-known roles were in English. He had doubts as to whether or not she'd be able to master the German dialect. However, upon auditioning, she proved she was, indeed, a native speaking German.
In the scene where Landa kills Hammersmark, the hands doing the strangling are Quentin Tarantino's. Even crazier, he actually choked her and stopped just before she lost consciousness. Thankfully, they got it in one take so she wouldn't have to risk her life a second time for the scene.
The new Nazi father Willhelm was killed in the movie by undercover actress Bridget von Hammersmark. But he actually survived in the original draft of the script. He was initially the one who tipped off Landa and blew their cover at the film premier.
Near the end of the movie when the Basterds pretend to be Italian, Aldo Raine says his name is "Enzo Gorlomi." This is actually an homage. That's the birth name of Enzo G. Castellari, the director of the 1978 film The Inglorious Bastards.
All of the actors playing the Basterds had to go through a special type of training. Each completed a one day scalping training course in order to prepare for the movie. As an added incentive, Tarantino told them that the best three would be rewarded with a close-up of them performing the grisly action in the film.