In order to become a Hollywood automotive icon, a car has to be customized for the big screen in a really special and memorable way. Hollywood has produced many cool cars over the years but only a select few have become icons of both pop culture and the car industry. It's not easy to pull off. But when it's done right, a customized movie car inspires dozens upon dozens of replicas, toys and dreams. So here are five famous Hollywood only cars that have rightfully earned their icon status.

This is what happens when you combine a Lamborghini and a tank with a sprinkling of Hummer. The Tumbler first became Batman's car/weapon of choice in "Batman Begins" but was unfortunately destroyed in the sequel. Director Christopher Nolan made the wise decision to request for his production team to design a Batmobile that was more realistic than previous versions of the famous crime fighting car. The Tumbler came complete with all of the typical gadgets and it could also scale buildings. That's just badass.

Ghostbusters" is without question one of the best comedies of the 1980s. It was made even more memorable thanks to the Ecto-1, a converted Cadillac ambulance that transported Peter Venkman, Raymond Stantz, Egon Spengler and Winston Zeddemore to the scene of the latest paranormal activity to strike New York City. Built from what was originally a 1959 Cadillac Miller Meteor ambulance, the Ecto-1 looked downright awesome in a geeky sort of way. Just admit that you'd love to take it for a spin while humming Ray Parker, Jr's famous theme song.

The way I see it, if you're going to build a time machine into a car, why not do it with some style?" - Dr. Emmett L. "Doc" Brown. When "Back to the Future" premiered in 1985, the DeLorean Motor Company had gone under just a few years before thanks to its founder, John Z. DeLorean, getting caught up in a cocaine trafficking scandal. Were it not for the film, the DeLorean could have gone into the dustbin of automotive history. With its flux capacitor and plutonium chamber (later Mr. Fusion), the DeLorean Time Machine will forever be an icon.

British Secret Service Agent James Bond, aka 007, is synonymous with the Aston Martin DB5. Driven by Sean Connery in "Goldfinger" and "Thunderball", the DB5 was and still is the ideal combination of danger and sophistication, much like its tuxedo-wearing, martini-sipping driver. With plenty of hidden gadgets and enough sex appeal to make even non car-loving women pay attention, the original film model DB5 recently sold for $4.6 million at auction.

Back in the day when Mel Gibson was actually cool, he starred in "Mad Max," a film about a complete breakdown of modern society in Australia due to Earth's oil supplies running out. Gibson played the title character who drove the Pursuit Special, also known as the V8 Interceptor, a modified 1973 Ford Falcon XB GT. The film's creators wanted the car to look really menacing so they added larger gasoline tanks out back, enhanced rear wheels, a completely reworked front end and a non-functional supercharger.