Erison Hurtault and Luan Gabriel are representing Dominica at the London Olympics according to the official games website.
The games are expected to officially open on Friday.
Hurtault is a US citizen however his parents are from Dominica.
The London Olympics is his second.
Hurtault, who grew up in New Jersey, graduated from Columbia University in 2007 and presently lives in Harlem.
He was a 400-meter dash semifinalist at the 2009 Berlin and 2011 Daegu World Outdoor Championships, as well as the 2012 Istanbul World Indoor Championships. He represented Dominica in the 400 meters at the 2008 Olympics in Beijing, placing 34.
Gabiel, who will be competing in her first Olympics, has been raising eyebrows on the Caribbean athletic circuit. She secured gold at the last CARIFTA in the U-17 Girl’s 200 meters.
She also created a new national record in the U-17 200 meters in Tobago last year.