- Lindsay Arnold and Witney Carson were both extras in High School Musical 3: Senior Year (2008), in the number, "I Want It All".
- Married her high school sweetheart, Sam Cusick, on June 18, 2015.
- Has three younger sisters: Jensen Arnold (b. 1997), Brynley Arnold (b. 2000) and Rylee Arnold (b. 2005).
- On May 13, 2020, she announced she and Sam Cusick were expecting their first child together. In November 2020.
- (May 21, 2020) Expecting a daughter with her husband Sam Cusick in November.
- (November 4, 2019) Her mother-in-law has died.
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