Here are 20 interesting movie trivia facts that will pique the interest of any film buff:

1. The Wizard of Oz (1939) was nearly a flop: The film was released during the Great Depression, and its initial box office performance was lackluster. It wasn't until it was re-released in the 1940s that it gained popularity, eventually becoming a classic.
2. Casablanca (1942) was shot without a finished script: The screenplay was written on the go, with many of the iconic lines being improvised. For example, the famous line "Here's looking at you, kid" was ad-libbed by Humphrey Bogart.
3. The first feature-length animated film: Walt Disney's Snow White and the Seven Dwarfs (1937) was the first-ever feature-length animated film. It revolutionized animation and set the stage for future animated films.
4. Alfred Hitchcock's cameos: The legendary director Alfred Hitchcock was known for making cameo appearances in his films. For example, in Rear Window (1954), he appears briefly in a scene where a man is seen walking a dog.
5. The iconic roar of the MGM lion: The roar of the lion in the MGM logo is actually a composite of several different lions. The original lion, Leo, was the most famous, but the studio used recordings from multiple lions over the years.
6. Leonardo DiCaprio's Oscar journey: After several nominations, Leonardo DiCaprio finally won his first Academy Award for Best Actor in The Revenant (2015) after being nominated for five previous roles.
7. The longest-running film in cinema history: The Rocky Horror Picture Show (1975) holds the record for the longest-running theatrical release in film history, having been shown continuously in theaters for over 45 years.
8. Star Wars' unique sound effects: The iconic sounds of lightsabers and blasters in Star Wars were created using a mix of real-world sounds, including the hum of a microphone and the sound of an old television set being turned on.
9. The Matrix's green tint: The green tint in The Matrix (1999) was added to emphasize the computer-generated world. The filmmakers wanted to give audiences a sense of the digital reality that the characters were experiencing.
10. Jaws (1975) was a game-changer: Jaws is often credited with inventing the summer blockbuster. Its massive success at the box office changed how studios approached film releases.
11. Forrest Gump's box of chocolates: The famous quote, "Life is like a box of chocolates," was inspired by a line from the novel by Winston Groom. The line became iconic after Tom Hanks delivered it in the film Forrest Gump (1994).
12. The use of practical effects in Jurassic Park: While Jurassic Park (1993) is famous for its groundbreaking CGI, many of the dinosaur effects were achieved using practical effects, including animatronics and life-sized models.
13. The Godfather (1972) had a unique casting process: Marlon Brando was not the first choice for the role of Vito Corleone. The studio initially considered several big names, but Brando's audition, which included stuffing his cheeks with cotton balls, won him the role.
14. Avatar's groundbreaking technology: James Cameron's Avatar (2009) utilized revolutionary motion-capture technology, allowing actors' performances to be translated into CGI characters in a way that hadn't been done before.
15. Frozen's "Let It Go" was a phenomenon: The song "Let It Go," performed by Idina Menzel in Disney's Frozen (2013), became a cultural phenomenon, reaching number one on the Billboard Hot 100 and becoming an anthem for empowerment.
16. Indiana Jones' fear of snakes: Harrison Ford, who played Indiana Jones, is actually afraid of snakes. This fear added authenticity to the character's infamous phobia in the films.
17. Shakespeare in Love's surprise win: At the 1999 Academy Awards, Shakespeare in Love upset Saving Private Ryan for Best Picture, a decision that shocked many in the industry.
18. Harry Potter's casting was a global search: The casting of Daniel Radcliffe as Harry Potter was the result of an extensive global search. Over 40,000 children auditioned for the role before Radcliffe was chosen.
19. The Shawshank Redemption's popularity: Initially, The Shawshank Redemption (1994) was not a box office success but gained a massive following after its release on home video and became one of the most beloved films of all time.
20. Pixar's tradition of hidden references: Pixar films are known for including Easter eggs and references to other films. For example, the Pizza Planet truck appears in nearly every Pixar movie, serving as a fun nod to fans.

These trivia facts not only showcase interesting aspects of film history but also highlight the creativity and innovation that continue to shape the industry today.