Joseph Anthony Gatto Jr. (born June 5, 1976) is an American improvisational comedian, actor, and producer from the New York City borough of Staten Island.

He is a former member of the Tenderloins, a comedy troupe consisting of Sal Vulcano, James Murray, and Brian Quinn.

The Tenderloins began producing comedy sketches together, posting them on YouTube, Myspace, and Metacafe, accumulating millions of views online.

In 2007, the troupe won the $100,000 grand prize in the NBC It's Your Show competition for the sketch "Time Thugs".

In October 2019, Gatto, along with the other members of the Tenderloins, starred in The Misery Index, which is hosted by Jameela Jamil and is based on Andy Breckman's card game "Shit Happens".

On December 31, 2021, Gatto announced he was stepping away from Impractical Jokers and the Tenderloins on good terms to focus more on co-parenting his children, after a then-split with his wife.

Gatto and Byrne discuss the problem, deliberate, and ultimately deliver some wholesome, balls-on accurate motherly advice.