Deanna Del Re (born December 31, 2004) is the daughter of Joe and Adele, the fraternal twin sister of Peter, and the younger sister of Clarissa.

Deanna is not as bad as Peter, but she was very defiant, extremely stubborn, sometimes could get aggressive and wouldn't give in.

During Reinforcement Deanna went to timeout because she was laying on the floor throwing a temper tantrum. While in timeout she went to the bathroom on the floor after she refused to apologize. Jo arrived and told Mom to tell Deanna that going to the bathroom on the floor is wrong and timeout shouldn’t end faster doing that, even if she really needed to go to the bathroom.

She was 4 years old on Supernanny and as of 2018, is 14 years old.