Guy Andrew Cosmo[1] (born 12 March 1977 in Port Jefferson, NY) is an American racing driver who competes in the United SportsCar Championship.

Cosmo competed in the majority of the 2008 and 2009 seasons with Spirit of Daytona Racing, as part of the team's development program with its Lozano Brothers-tuned Porsche Cayenne V8 engine.

Cosmo made his ALMS debut in 2003 with a 9th-place finish at the 12 Hours of Sebring in American Spirit Racing's Riley & Scott MKIIIC.

In 2005, he earned Rookie-of-the-Year honors after completing his first full season, which included one LMP2 class victory and eight podium finishes in the B-K Motorsports Courage C65 Mazda.

Cosmo joined Extreme Speed Motorsports in 2010 as part of its Ferrari GT program, which saw him paired with Patron Spirits CEO Ed Brown from 2010 to 2012.