McNairy was born on November 11, 1977, in Dallas, Texas, to Alicia Ann McNairy (née Merchant) and Stewart Hall McNairy. In addition to a house in Dallas, the family had a ranch in rural Paris, Texas, where they spent time on weekends and holidays. Growing up, he did theater in after-school programs. His father began calling him Scooter when he was about two years old. "A lot of people are like, oh, it must be some amazing story. But it's because I used to scoot around on my butt," says McNairy.
