JJ Colombo (born June 29, 2007) is the middle child of Danielle and Joe, the younger brother of Carlo and the older brother of Julia.

He was the worst one out of the three Colombo kids. He was aggressive and acted out with hitting, kicking, pinching, hair pulling and punching. He also talked rudely and yelled a lot.

When it came to his nap-time, Danielle and Jo actually argued about it.

He was 3 years old at the time and of 2017, he is 10 years old.