December 08, 2014 02:00 PM

Haylie Duff‘s pregnancy is truly icing on her wedding cake.

“It’s pretty cool to think our daughter is going to be at our wedding,” the mom-to-be’s fiancé Matt Rosenberg told reporters at the 4th Annual Santa’s Secret Workshop in West Hollywood on Saturday.

But the Real Girls Kitchen host — who’s in her second trimester — admits that since she and Rosenberg discovered they had a bun in the oven, their wedding plans have been put on the back burner for a bit.

“We still talk about things we want to do, but it’s a big change with the baby coming,” Duff, 29, explains. “We’re just trying to focus on one thing first and then we’ll do it.”

Aside from playing the name game and dreaming up her ideal nursery, Duff’s focus has been staying fit. Fortunately, her healthy pregnancy cravings are making it easy.

“I drink a lot of green smoothies,” she says. “I think I’ve craved health food, which is weird, and then the occasional mac and cheese.”

Tiffany Rose/WireImage

But it’s Duff’s workout routine that is making the dad-to-be a “little nervous,” she admits.

“He’s like, ‘Don’t push yourself too hard.’ I’m like, ‘I got it! I’m fine.’ I’m just trying to move. Go on walks. I’m not trying to put too much pressure on myself either way,” she shares.

“I feel better when I’m active. I try to do something every day, even if it’s just a little walk or whatever, but there’s some days I don’t do anything!”

And while all that work means an earlier bedtime for the expectant actress, it’s Rosenberg who’s showing signs he’s ready for all-nighters with a newborn. “He’s in dad mode already,” Duff says. “He’s up at six in the morning doing chores around the house. I’m like, ‘Who is this person?'”

After weeks of exhaustion and daily naps during her first trimester, Duff is excited to be experiencing a sudden surge of energy. “The majority of pictures he’s taken of me are me passed out during the middle of the day,” she jokes.

“But everyone talks about this burst of energy you get in the second trimester and it’s very true. I feel like I’m back at it.”

But what she’s most looking forward to: lots of love and plenty of darling dresses.

“I feel like I’m the most excited to learn what love is on a whole different level,” she explains.

Adds Rosenberg: “She’s really excited to dress the baby up in cute clothes.”

— Anya Leon with reporting by Christina Dugan

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