The Aston Martin DB9 is a grand tourer first shown by Aston Martin at the 2003 Frankfurt Auto Show. Available both as a coupe and aconvertible, the DB9 was the successor of the DB7. It was the first model built at Aston Martin's Gaydon facility.

The DB9, designed by Ian Callum and Henrik Fisker, is made of largely aluminium. The chassis is the VH platform, also found in the Aston Martin DBS. The engine, on the other hand, is the 6.0L V12 from the Aston Martin V12 Vanquish. The most recent Aston Martin has a top speed of 295 km/h (183 mph) and a 0 to 97 km/h (60 mph) time of 4.1 seconds.

The DB9 is rated well by car critics, who appreciate the car's interior and exterior design. Additionally, in spite of the DB9's weaker engine and handling, reviewers liked the car's ride and driving experience. They held issue with the DB9's small rear seats and cargo space and poor satnav, however.

Aston Martin Racing has adapted the DB9 for sports car racing, producing the DBR9 for FIA GT1 and the DBRS9 for FIA GT3. These two cars are lightened DB9s; the interior features are removed and the aluminium body panels are replaced by carbon fibre panels. Additionally, engine has been tweaked in both the cars to produce more horsepower. The DBR9 has won in several events, including its debut event.