- Son of Brian Littrell and Leighanne Littrell.
- Talking about his Kawasaki Disease he recalled leaving the hospital in a Batman costume.
- First acting job was on the Broadway show, Disaster!.
- Cousin of Mason Frey Richardson and Maxwell Haze Richardson.
- First cousin of Kevin Scott Richardson.
- Started playing on a Little League and Basketball rec teams both coached by his father as well as Karate, Lacrosse, Football, and Soccer.
- Began taking lessons in acting, vocal, guitar from his father, and piano.
- Also participated in taking lessons in acting, dance, and cooking.
- Littrell is Scottish-Irish through his parents but is also English (20%), some German through his dad like his cousin, but in 2019, a DNA heritage test revealed he's also Finnish (7.1%), Scandinavian (2.1%), and Welsh (70.1%) descent and Cherokee Indian, and Swedish through mom.
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