The couple, Tania and Jorge, surprised the chimp named Limbani at the Zoological Wildlife Foundation in Miami, Florida.
Limbani was born with pneumonia and was rejected by his mother.
The Miami couple took care of him for months until he was healthy.
In a post, the Zoological Wildlife Foundation said Limbani reacts the same way every time he sees Tania and Jorge.
Without human intervention and modern medicine, the foundation said that Limbani would not have survived.