"I could not be happier," Hough, 22, tells PEOPLE of her beau – about whom she's been mostly mum. "Everything is wonderful."
"We are very compatible," Hough says of Seacrest, 35. The two have been linked since the summer.
Hough, who is currently promoting Burlesque and just wrapped a starring role in the remake of Footloose, says her busy schedule hasn't affected her romantic life.
"The things that matter most to me, you just make time for," she says.
As for all the attention surrounding her relationship with Seacrest, Hough says it did take some getting used to.
"People I have dated in the past, even though they have had a status of some sort, it was never like this," she says. "But when it's worth it, it's worth it."
Getting the stamp of approval from her family was also very important to the former Dancing with the Stars pro, whose brother Derek told PEOPLE in October that Seacrest "just fits right in with the family."
Says Julianne: "It's a good feeling."