Abigail Loraine Hensel and Brittany Lee Hensel (born March 7, 1990) are American conjoined twins. They are dicephalic parapagus twins (having two heads joined to one torso), and are highly symmetric for conjoined twins. Each has a heart, stomach, spine, pair of lungs, and spinal cord. Each twin controls one arm and one leg. When they were infants, learning to crawl, walk, and clap required cooperation. They can eat and write separately and simultaneously. Activities such as running, swimming, hair-brushing, playing piano or volleyball, riding a bicycle, or driving a car require coordination.

The twins' lives have been covered in the popular media, including Life magazine and The Oprah Winfrey Show. They were interviewed on The Learning Channel in December 2006, discussing their daily lives and future plans. They starred in their own reality television series, Abby & Brittany, on TLC in 2012.

Since 2013, the two have been teachers in Minnesota.