Chris Pratt apparently stole his Star-Lord costume from the set, for the sole purpose of having it available so he could show up in costume to visit sick children in the hospital, who might want to meet Star-Lord.

In an e-mail to director James Marsh about the portrayal by Eddie Redmayne, Stephen Hawking said there were certain points when he thought he was watching himself. In addition to his copyrighted voice, Stephen Hawking also lent the filmmakers his Companion of Honour medal and his signed thesis to use as genuine props in the film.

NASA shows this film during their management training program. New managers are given the task of trying to spot as many errors as possible. At least one hundred sixty-eight have been found.

The film's budget was so low that the makeup budget was $250. The film's artists were able to work with that, and the film's Makeup and Hairstyling won an Oscar.

The cat held by Marlon Brando in the opening scene was a stray that Coppola found while on the lot at Paramount, and was not originally called for in the script. So content was the cat that its purring muffled some of Brando's dialogue, and, as a result, most of his lines had to be looped.

Kung Fu choreographer Woo-Ping Yuen initially refused to work on the film, and hoped that by asking for an exorbitant fee, it would turn off the Wachowskis. It didn't. He next formulated what he considered an impossible request. He said that he'd agree only if he had complete control of the fights, and that he trained the actors for four months before they shoot. The Wachowskis complied with his request.

In the film, when Elizabeth arrives at St. Paul's Cathedral, construction is going on. In real life, St. Paul's actually needed repair work. Director Shekhar Kapur decided to improvise, and gave the workers costumes and period tools to cut real stone that was being installed in the cathedral. The workers in the scene are real-life stonemasons and construction workers.

When Calvin Candie (Leonardo DiCaprio) smashes his hand on the dinner table, DiCaprio accidentally crushed a small stemmed glass with his palm and really began to bleed. He ignored it, stayed in character, and continued with the scene. Quentin Tarantino was so impressed that he used this take in the final print, and when he called cut, the room erupted in a standing ovation.

Tom Hanks was not paid for this film. Instead, he took percentage points which ultimately netted him in the region of forty million dollars.

After finding out that she had to be naked in front of Leonardo DiCaprio, Kate Winslet decided to break the ice, and when they first met, she flashed him.

To gather costumes for 20,000 extras, the costume designer took out advertisements seeking clothes. As economic conditions were poor in Poland, many people were eager to sell clothing they still owned from the 1930s and '40s.

Georgie Henley's reaction to Mr. Tumnus at the lamppost is genuine. She had not seen her castmate James McAvoy in his costume before the scene was filmed, so her screams and reaction were real. Georgie's first reaction to the snowy world of Narnia is also genuine. She was carried into the set blindfolded to make her first entrance, and her wide-eyed, delighted reactions to it, all are entirely her own.

In preparation for his role as The Joker, Heath Ledger hid away in a motel room for about six weeks. During this extended stay of seclusion, Ledger delved deep into the psychology of the character. He devoted himself to developing The Joker's every tic, namely the voice and that sadistic-sounding laugh.

Keanu Reeves performed about 95 percent of the fight scenes himself. To prepare for the role, Keanu trained for three months. His training consisted of Judo, Brazilian Jiu-Jitsu, marksmanship, and driving.

The cast often had to fly to remote shoot locations by helicopter. Sean Bean (Boromir) was afraid of flying, and would only do it when absolutely necessary. When they were shooting the scenes of the Fellowship crossing the snowy mountains, he'd spend two hours every morning, climbing from the base of the mountain, to the set near the top, already dressed as Boromir. The crew being flown up, could see him from their helicopters.

Edward (Richard Gere) snapping the necklace case down on Vivian's (Julia Roberts) fingers, was improvised by Gere, and Roberts's reaction (laughter) was totally natural. The filmmakers liked it so much, they decided to leave it in.

For a cornfield scene, Christopher Nolan sought to grow five hundred acres of corn, which he learned was feasible from his producing of Man of Steel (2013). The corn was then sold, and actually made a profit.

One afternoon during a break in filming, Arnold Schwarzenegger went into a restaurant in downtown L.A. to get some lunch and realized all too late that he was still in Terminator makeup - with a missing eye, exposed jawbone and burned flesh.

The sound of the automatic doors opening on the U.S.S. Enterprise, is a Russian train's toilet flushing.

Leonardo DiCaprio chose to devour a raw slab of bison's liver, even though he is vegetarian. He also had to learn to shoot a musket, build a fire, speak two Native American languages (Pawnee and Arikara), and study with a doctor who specializes in ancient healing techniques. DiCaprio calls it the hardest performance of his career.

The sounds the Velociraptors make when communicating is the same sound tortoises make when having sex.

Benedict Cumberbatch confessed that in one of the final scenes of the film, he couldn't stop crying and had a breakdown. It was, as he said, "Being an actor or a person that had grown incredibly fond of the character and thinking what he had suffered and how that had affected him."

Will Smith grew so enamored of his canine co-star, Abbey, that he tried to adopt her when filming was finished, but the dog's trainer could not be persuaded to give her up.

Henry Cavill refused to take steroids to muscle up for the role. He also refused any digital touch-ups or enhancement to his body in his shirtless scenes. He said it would have been dishonest of him to use trickery while playing Superman, and he wanted to push his body to the limits, to develop his physique into one that was worthy of the character.

Director Danny Boyle placed the money to be paid to the 3 lead child actors in a trust that is to be released to them upon their completion of grade school at 16 years of age. The production company has set up for an auto-rikshaw driver to take the kids to school everyday until they are 16 years old.

When Andy goes to the library to begin work as Brooks' assistant and Brooks' crow, Jake, is squawking, Tim Robbins had to time his line, "Hey, Jake. Where's Brooks?" so that the crow wouldn't squawk over him, since the bird could not be trained to squawk on cue. Robbins was able to adapt to this and time his line perfectly by learning the bird's squawking patterns, for which Writer and Director Frank Darabont praised him. Robbins' improvisation is noticeable, as he watches the bird carefully while approaching it, waiting for it to squawk, and doesn't begin his line until after it does so.

Matt Damon admitted that the scene where Mark was getting emotional upon hearing Commander Lewis' voice was genuine. The other actors had wrapped and gone home, and their pre-recorded voices were actually being played to Damon from inside his spacesuit. When Damon began to think about how his character had been all alone on Mars for two years, alongside how he was only hearing pre-recorded voices of his co-stars who had already finished their scenes, he began to tear up. Ridley Scott was so impressed with Damon's performance, that he only did one take of the scene, which was used in the film.

The scenes set in 1912, i.e. the whole movie except the present-day scenes and the opening and ending credits, have a total length of two hours and forty minutes, the exact time it took for Titanic to sink. Also, the collision with the iceberg reportedly lasted 37 seconds, which is how long the collision scene is in the movie.

While doing a press conference in Japan for the release of the movie, Will Smith accidentally revealed the ending to a collection of entertainment reporters. Warner Bros. asked the reporters and all those present to withhold the ending, and the reporters all obliged without any pay-off or consideration.

Tom Sizemore was battling a drug addiction during production. Steven Spielberg gave him an ultimatum that he would be blood tested on the set every day of filming, and if he failed the test once he would be fired and the part of Horvath would be recast and re-shot with someone else, even if it was at the end of production.

Gal Gadot was a part of re-shoots for the movie (including stunts) while being five months pregnant. Her baby bump was visible, so the crew created a costume which had a green screen around her belly, which was later removed during post-production.

At a Q&A session after screening of the film, James Corden recalled an incident during rehearsals in which Meryl Streep jumped on a table and her foot got caught in her costume. She started falling backwards, head first, toward a concrete floor. Both Corden and director Rob Marshall froze in the fear that they were about to witness the death of Meryl Streep. However, a pregnant Emily Blunt stepped in and caught Streep before she hit the floor.

Angelina Jolie admitted that she scared little kids while in costume on the set of Maleficent, with one kid actually saying, "Mommy, please get the mean witch to stop talking to me." She adds that her daughter, Vivienne Jolie-Pitt, who played young Aurora, was the only child who was not scared of her.

Eddie Redmayne met with Stephen Hawking only once before filming. "In the three hours I spent with him, he said maybe eight sentences," recalls Redmayne. "I just didn't feel like I could ask him intimate things." Therefore, he found other ways to prepare for the role. He lost about 15 pounds and trained for four months with a dancer to learn how to control his body. He met with 40 ALS patients, kept a chart tracking the order in which Hawking's muscles declined, and stood in front of a mirror for hours on end, contorting his face. Lastly, he remained motionless and hunched over between takes, so much so that an osteopath told him he had altered the alignment of his spine. "I fear I'm a bit of a control freak," Redmayne admits. "I was obsessive. I'm not sure it was healthy."

On the first day of filming, Meryl Streep told Anne Hathaway, "I think you're perfect for the role. I'm so happy we're going to be working together." Then she paused and followed it up with, "That's the last nice thing I'll say to you." And it was.

Many fashion designers allowed their clothes and accessories to be used in the film, making it the most expensively-costumed film in history. Meryl Streep donated her wardrobe to a charity auction.

Wand school was obligatory for several of the cast members. The actors and actresses would attend a boot camp, in order to be instructed how to move and use a wand properly.

Sylvester Stallone wanted to make sure the boxing scenes looked real in Rocky IV, so he instructed Dolph Lundgren to actually hit him. A punch to the chest left Stallone in intensive care for four days.

Natalie Portman not only trained for a year as a dancer to prepare for the role, but paid for the the training out of her own pocket until the film found investors. Aronofsky attributed the film's getting made at all to Portman's dedication and enthusiasm.

Brad Pitt and Edward Norton both really learned how to make soap.

To make himself look like an average out of shape middle aged man Tom Hanks didn't exercise and allowed himself to grow pudgy. Production was then halted for a year so he could lose fifty pounds and grow out his hair for his time spent on the deserted island.

Brendan Fraser nearly died during a scene where his character is hanged. Rachel Weisz remembered, "He stopped breathing and had to be resuscitated."

Arnold Schwarzenegger worked with guns every day for a month to prepare for the role. The first two weeks of filming he practiced weapons stripping and reassembly blindfolded until the motions were automatic, like a machine. He spent hours at the shooting range and practicing with different weapons without blinking or looking at them when reloading or cocking. He also had to be ambidextrous.

Daniel Kaluuya was given the lead role on the spot after nailing his audition. Jordan Peele said Kaluuya did about five takes of a key scene, in which his character needs to cry, and each was so perfect that the single tear came down at the exact same time for each take.

In order to better portray an alcoholic, Michael Fassbender had his makeup artist paint his mustache with alcohol so that the other actors would react naturally to the smell, as they would to a man who had been drinking heavily.