Hilary Duff 'Completely Surprised' By Proposal, Sister Says

While on vacation in Hawaii with her boyfriend, Hilary Duff had no idea her relationship status was about to change from "girlfriend" to "fiancée."

"She was completely surprised," Hilary’s sister Haylie Duff said Saturday in Las Vegas. "I don't think that happens all the time. I think most of the time people figure it out or have some idea that it’s going to happen, and I think it's great he was able to do a surprise like that for her."

In fact, the whole family was surprised, yet excited, when Duff’s hockey player boyfriend Mike Comrie, 29, proposed to his girlfriend of more than two years in Hawaii, she said.

"I adore him," Haylie said before celebrating her 25th birthday at Hard Rock Hotel's Vanity Nightclub. "He's wonderful."

Though she didn’t know the details of the proposal, the older of the Duff sisters said it was "very romantic."

Whether Haylie will be a bridesmaid at her 22-year-old sister's wedding remains to be seen. "They just got engaged a few days ago. I don’t even know if she's thinking of the wedding yet."