Julianne Hough will be an 'amazing' mother

Julianne Hough's brother thinks she'll be an "amazing" mother.

Derek Hough "can't wait" for his newly-engaged sibling to marry fiancé Brooks Laich and thinks they'll be great parents whenever they eventually decide to start a family together.

Asked what kind of mother he thinks Julianne will be, the 30-year-old professional dancer said: "Oh my gosh. She'll be amazing. She'll be amazing whenever that day comes."

Derek is thrilled Julianne recently accepted Brooks' proposal.

The 'Dancing With the Stars' performer told UsMagazine.com: "He's a great guy, he's a great dude. I'm excited to have a new brother, man. I'm excited!

"He would never wrong her in that way ever."

But he thinks Brooks, 32, and Julianne, 27, "talk about the most random things."

He explained: "We've been on a tour bus, we were on tour, and she would FaceTime him every day after the show. The same time, clockwork, and sometimes they just talk about the most random things and I'm like, 'Oh my gosh, I gotta leave.' "

The couple got engaged earlier this month while on holiday with Julianne's family, and she admits she "blacked out" when Brooks got down on one knee.

Writing on her official website, she shared: "We were at home, romantic and relaxed, which is perfectly very 'us.' We stood on the deck, watching the sun set over the lake and listening to our favorite songs. Not even for a second did I expect that beautiful, serene scene was about to become one of the most meaningful moments of our lives."