Tira and Misu are the offspring of Napoleon and Cannoli.
Zoo visitors helped to choose the names. Facility Director Denise McClean said they're fitting for the sweet little creatures.
The names are also conveniently gender neutral. The twins were born in April. It's too early to know whether they're brothers, sisters, or one of each.
Tira and Misu are less than 6 inches long. Adults are about 8 to 9 inches long, with a 12-inch tail.
The adults share parenting duties. The dad, Napoleon, gives piggyback rides to the babies.
The monkeys are officially called Geoffrey's tamarins. They're native to South America.