Full name: Nathan Daniel Leone
Nicknames:
Birthday: May 6th
Role in the band: Leadsinger
Is married to Jenna Leone.

Nathan fell out of a grocery cart when he was five, tearing a muscle in his eye, so he had to wear a patch and glasses for much of his childhood. When Nathan and Matthew were 12 years old, their mother died in a car accident. Matthew and Nathan attended the same schools, from the 7th grade through high school.
Nathan and Matthew landed sports scholarships to go to college in Indianapolis, Indiana. They pursued professional soccer careers in the United States and for nine months in Florence, Italy.
The brothers then decided to get involved in music. They had formed their first band, The Blank Theory, in 1998. In the early days of The Blank Theory, they also formed an independent label called 4 Alarm Records which also included The Frogs, The Pinehurst Kids, and Monkey Paw.
Nathan and Matthew appeared on a special edition of Twin Fear Factor, which they won.

- He writes with his right hand.
- Has a tattoo on the left side of his head and is the shape and about the size of the scar from Matthew’s brain surgery, the tattoo reads “On earth the lesson is to let go, unless you’re the instructor.”.
- He wrote ‘In Another Life’ after a dream he had. In this dream his girlfriend back then killed herself.
- Nathan plays the guitar but he thinks he’s terrible at it.
- Nathan used to intern at Scratchie’s Chicago headquarters.
- Nathan is claustrophobic (as he told in the Fear Factor interview)
- Started with guitar when he was 19.
- His favorite songs are River People or Morning Sadness.
- His favorite quote is “If you’re going to strike at the king you better kill him”
- He has a cat called Gipper (a Himalayan) and a cat called Pumba.
- He worked in a video rental store.
- Says he’s a Buddhist (“I wouldn’t call myself anything specifically but lots of the things that resonate with me are Buddhist related and Hinduism as well”)

The tattoo on Nathan’s head is the shape and about the size of the scar from Matthew’s brain surgery. The tattoo reads, “On earth the lesson is to let go, unless you’re the instructor.” (Abel Uribe, Chicago Tribune / December 18, 2010)