Charlie Day’s wife, actress Mary Elizabeth Ellis, met Charlie Day in 2001. Furthermore, the couple married in 2004 and co-starred as incestuous siblings on Reno 911! On March 4, 2006, the couple married. He also posted on Instagram, “13 amazing years of marriage and nearly 18 years together with @meellisday #changedmylife #love.”
The couple has children as well. In December 2011, they welcomed their first child, a son named Russell Wallace Day. They are residents of Los Angeles, California.