"I haven't even thought about it," she told ET. "I'm, like, the worst bride ever."
The couple began dating in December 2013 after Hough called it quits with Ryan Seacrest. She dated the American Idol host from 2010 to 2013.
See photos of the couple:
Julianne Hough and Brooks Laich
Why Julianne Hough says she's the 'worst bride ever'
LOS ANGELES, CA - SEPTEMBER 12: Brooks Laich and Julianne Hough attend the 2015 Creative Arts Emmy Awards at Microsoft Theater on September 12, 2015 in Los Angeles, California. (Photo by Jason LaVeris/FilmMagic)
BEVERLY HILLS, CA - AUGUST 30: Julianne Hough, engagement ring detail, attends the Television Academy's cocktail reception for the 67th Emmy Award nominees for Outstanding Choreography at Montage Beverly Hills on August 30, 2015 in Beverly Hills, California. (Photo by Jason LaVeris/FilmMagic)
BEVERLY HILLS, CA - AUGUST 30: Brooks Laich and Julianne Hough attend the Television Academy's cocktail reception for the 67th Emmy Award nominees for Outstanding Choreography at Montage Beverly Hills on August 30, 2015 in Beverly Hills, California. (Photo by Jason LaVeris/FilmMagic)
#tbt to this handsome mans birthday on Tuesday! Fun family day at the lake in Atlanta... 🐶🐼🚣🎣🏄🏼 @brookslaich #lexi #harley #family #love
#fbf with my love! I love days like these... No makeup, sweatpants, watching tv (sleeping) on the couch with our girls or hiking in the crisp DC air with #Lexi and #Harley #family #cda @brookslaich
#Repost @brookslaich with @repostapp. ・・・ Beautiful day, beautiful lady! @juleshough
Like mother like daughter! I had no idea #lexi and I were pulling the same face! Thanks for sending this @brookslaich #themanyfacesofjules #harley #therealbigeyes
Boy does this man put a smile on my face and in my heart! Miss you sweetheart @brookslaich #saskatchewan #fun #atv #quading #love #honest #committed #faith #trueself #life #family
Hudsons Hamburgers: cheese both ✔️ double cheese both ✔️special sauce ✔️ root beer ✔️ first timer ✔️last timer ✖️not a chance!!!!! #yummy #cheatday #love #cda #family #hough #laich @brookslaich
WASHINGTON, DC - DECEMBER 31: Brooks Laich #21 of the Washington Capitals and actress Julianne Hough skate during the 2015 Bridgestone NHL Winter Classic practice day on December 31, 2014 at Nationals Park in Washington, DC. The 2015 Bridgestone NHL Winter Classic will take place on New Year's Day with the Washington Capitals playing the Chicago Blackhawks. (Photo by Jeff Vinnick/NHLI via Getty Images)
LOS ANGELES, CA - FEBRUARY 16: Julianne Hough and Brooks Laich are seen on February 16, 2014 in Los Angeles, California. (Photo by Bauer-Griffin/GC Images)
MALIBU, CA - MAY 10: Actress Julianne Hough and Brooks Laich attend the 'Open Hearts Foundation Gala' on May 10, 2014 in Malibu, California. (Photo by Angela Weiss/Getty Images for Open Hearts Foundation)
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Fortunately, all the hard work she's putting into the show seems to be paying off. Olivia Newton-John gave the 27-year-old actress her blessing in taking on her iconic role of Sandy.
"She was, like, 'Oh my gosh! You're going to be great! They couldn't have picked a better Sandy,'" Hough told ET.