Ford announced today it had built its 9 millionth Mustang, a GT convertible that will be delivered to a dealership in Iowa. The announcement comes less than a week after the Pony Car celebrated its 45th anniversary and at a time when the Mustang is one of the top selling sports cars in the world.

The car is also Ford’s longest-running nameplate, having been introduced on April 17 at the 1964 New York World Fair, and today one out of every two sports cars sold in the U.S. is a Ford Mustang. Sales topped 419,000 units in its first 12 months on the market, and passed the one million mark in the first two years, shattering the sales records of any single model in history.

Today the car is in its fifth generation and is comes in coupe and convertible versions and will soon be available with a glass roof option as well. The next couple of years will see the introduction of a facelifted model and eventually an all-new design. This ‘sixth generation’ model will be based on Ford’s all-new global RWD platform and will feature a range of new engines including forced induction units as well as a fully independent suspension set-up.