She is the daughter of Mari Anne (Heaton) and Bruce Robert Hough, twice chairman of the Utah Republican Party.
She began her training in Latin ballroom dancing at the Center Stage Performing Arts Studio in Orem, Utah.
At age 10, along with her brother Derek Hough, she went to London to study with coaches Corky and Shirley Ballas.
She and Derek attended the Italia Conti Academy with the Ballas's son, Mark Ballas.
The three children performed as a pop music trio '2B1G' (2 Boys, 1 Girl) at dance competitions in the United Kingdom and the United States.
At age 15, Julianne became Junior World Latin Champion and International Latin Youth Champion at the Blackpool Dance Festival. She returned to the United States to live with her mother in Las Vegas, where she attended the Las Vegas Academy.
After a year, she moved back to Utah to live with her father and graduated from Alta High School.
She then moved to Los Angeles to begin a career in entertainment.
According to People, sources close to the couple have confirmed that they have decided to take a break and are currently living apart.
The sources say both Seacrest and Hough's busy work schedules ended up being too much on their relationship, although they remain friends and are in regular contact.