The twins were bit by the show biz bug while singing in the back seat of their parents' car, driving down from Pelham to see Broadway shows.
They got their first big break at Boston College, where they were cast as Jesus and Judas in the campus production of Godspell.
But recently, they hit cabaret gold when director Richard Jay Alexander took them under his wing. Alexander has worked with performance icons, including Bernadette Peters, Bette Midler and Barbra Streisand.
The twins start a 5-night residency at Feinstein's on Tuesday.
Download these in-studio sessions of the Nunziata's take on American standards:
Sondheim's "Pretty Women"
and Michael Feinstein's "Swing is Back in Style."
Watch them in rehearsal: