The world premiere of Marvel's big-budget Avengers movie at the El Capitan Theatre in Hollywood on Wednesday gave us the opportunity to Acura NSX Roadster to see in real life as actor Robert Downey Jr., better known as Tony Stark, drove the one-off concept model on the red carpet.

As noted in our previous articles, while the custom roadster exterior looks closely follow the lines of the  Acura NSX Roadster Concept shown at the Detroit Motor Show this past January, it's a different story under the skin as the car makes use of the platform and the interior of a first generation NSX.

Acura NSX Roadster

The two-seater model is not the only Acura model to star in the film as specially built MDX crossovers and TL sedans were used in the film of SHIELD agents.

Because it is an official sponsor of the film, alongside the arrival Downey's in the roadster, The Avengers stars Chris Evans (Captain America), Mark Ruffalo (The Hulk), Chris Hemsworth (Thor) and Jeremy Renner (Hawkeye) also came to the theater in a fleet of Acura models.

The new film opens in theaters on Friday, May 4, 2012.

More photos and two videos of the event to follow.