Derek and Julianne Hough
Derek Hough revealed how his sister Julianne Hough got engaged. Pictured: the siblings attend The Kaleidoscope Ball on April 10, 2014, in Beverly Hills, California. Getty

Julianne Hough’s engagement may have surprised fans, but it didn’t surprise her brother. “Dancing With the Stars” veteran Derek Hough revealed that he knew Brooks Laich would pop the question after having a serious talk with Derek and Julianne’s father, Bruce Hough.

“He went to my dad,” Derek, 30, revealed to the Insider (via Us Weekly). “They locked themselves out on a deck -- they were out there for a good two hours talking so I kind of had an idea. I was like, ‘Oh, OK. I see what’s happening!’”

Derek’s sister Julianne, 27, announced her engagement to hockey player Brooks Laich, 32, on Tuesday. “We are overwhelmed with joy and excitement to share with you our recent engagement!” she wrote on Twitter and Instagram.

She posted a photo of herself on Twitter and Instagram in Laich’s arms by what looked like a lake. Derek revealed that they were on vacation with their whole family. “We actually spent the week at the lake house and all the family was there, the kids, nieces and nephews,” Derek explained. “And we spent the most magical, amazing week together and then at the very end [they] got engaged. He’s a great guy, I just couldn’t be happier for them.”

It’s a good thing Laich has Derek’s stamp of approval because he is very close with his sister. The two just finished their “Move Live” tour and Julianne recently revealed that they give each other plenty of advice. However, it seems like they offer each other more advice on their professional lives than their love lives. Julianne said that her brother already gave her some tips for her role as Sandy in Fox’s “Grease: Live!”

“We're both each other's mentors in a way. I wouldn't say that one is more of a mentor than the other but we're there to feed off of each other,” Julianne told Us Weekly. "We're there with an objective, an opinion, it's not a competitive thing. It's more like we both want to see each other do well.”

Will Derek give his sister wedding planning advice? Only time will tell, but he’ll have to balance any wedding planning with his role on “DWTS.” Season 21, which premieres Monday, Sept. 14, on ABC, will be his final year in the competition.

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