The Aston Martin One-77 is a two-door coupé built by the British car manufacturer Aston Martin. It first appeared at the 2008 Paris Motor Show, although the car remained mostly covered by a "Savile Row tailored skirt" throughout the show,before being fully revealed at the 2009 Geneva Motor Show, and deliveries from the beginning of 2011.There was a limited run of 77 cars, giving part of the name of the One-77,and sold for GB£1,150,000.

Prior to the One-77's Paris Motor Show debut, various details about the car had been leaked, but official specifications were not fully revealed until the 2009 Geneva Motor Show.

The One-77 features a full carbon fibre monocoque chassis, a handcrafted aluminium body, and a naturally aspirated 7.3 litre (7312 cc) V12 engine with 750 hp (560 kW). Aston Martin claimed it would be the most powerful naturally aspirated production engine in the world when the first car was delivered.

The car uses a strengthened version of the DB9's 6-speed automated manual transmission and height-adjustable pushrod suspension coupled with dynamic stability control. It will feature Pirelli P Zero Corsa tyres (255/35 ZR20 front, 335/30 ZR20 rear) and Carbon Ceramic Matrix brakes.

The top speed was estimated to be 200 mph (320 km/h) but actual tests in December 2009 showed a figure of 220.007 mph (354.067 km/h), with a 0–60 mph time of approximately 3.5 seconds. The engineering and build source of the carbon chassis and suspension system was contracted to Multimatic of Canada.

The projected weight was 1,500 kg (3,307 lb), but the production model was 1,630 kg (3,594 lb). The CO2 emissions of the One-77 are rated at 572 g/km.