- Wilmer Valderrama and Cassandra Scerbo are godparents of her older son Kenneth.
- Lost her best friend and bridesmaid, Brittany Lauren Blanton (January 24, 1986-December 2, 2015), and first husband, Chris Carney (August 19, 1980-December 4, 2015), to different car crashes in just two days. Her husband Chris was the passenger in a car driven by his 37-year-old friend Ezekiel Blanton when the car lost control along U.S. Highway 70 East around 1:40 am. The car spun out and off the road before ploughing into a tree and one of the men was ejected. When police arrived to the single car crash both man had died from their injuries. It is not known how Brittany Blanton and Ezekiel were related, but Brittney was the good friend of Tiffany and Tiffany had spoken of the tragic loss just a few hours before her own husband was killed.
- (November 12, 2011) Married her boyfriend of 2 years Christopher Carney at Garvan Woodland Gardens, in Hot Springs National Park in Hot Springs, Arkansas, following a 22-month-long engagement.
- If she wasn't an actress she would have liked to be a pediatrician.
- (October 7, 2017) Married her boyfriend of 9 months Josiah Capaci following a 6-month-long engagement.
- Older brother is John Scott Thornton.
- She has had braces twice - first time for one year when she was 11 and then for another year the second time when she was 14 years old.
- She favors Harry Potter to Twilight (2008) but her favorite movies are Dumb and Dumber (1994), The Scent of a Woman (1985) and My Best Friend's Wedding (1997).
- Met her agent at the IMTA (international model & talent agency) where she went for acting and singing.
- Favorite actor is Al Pacino and her favorite actress is Sarah Jessica Parker.
- Broke her right forearm in 2 places when she was 11 and her left ankle when she was 15 years old.
- Has a puppy back in Texas named Lacy.
- Lives in an apartment in North Hollywood with roommate Melissa Carcache.
- Best friends with Katelyn Tarver, 'Karleigh Santry' and 'Katie Santry'.
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