Hayden Panettiere and her fiancé Wladimir Klitschko will be celebrating a very special Christmas this year, their first with newborn daughter Kaya Evdokia. The proud parents have been showing off their family’s latest addition to People magazine, with Panettiere also discussing her post-pregnancy body.

hayden panettiere and wladimir klitschkoNew parents Hayden Panettiere and Wladimir Klitschko

“I’m limping around. I’m still trying to figure out what [pregnancy] has done to my body, how it’s changed it. What’s temporary and what’s permanent,” the actress told People.

“I feel like an 80-year-old woman trying to go down the stairs, you know — please tell me this is temporary! But I know some things will never be the same again.”

More: Hayden Panettiere's Fiancé Wladimir Klitschko Celebrates Baby Girl's Birth, And The Rest of 2014

The 25 year old also described adjusting to life as a parent as “a surreal experience and so out of body”, explaining that “You’re suddenly looking at this little thing like, ‘Oh, that was you in my belly this whole time.”

But luckily for the new parents, Kaya has so far been an easy baby. “She’s really so sweet,” Panettiere said. “I’m sure that’s the way it’s meant to be, because when they are putting you through the wringer you’re like, ‘You are so lucky you’re cute!'”

More: Hayden Panettiere, Glowing In Silver At Emmys, Reveals She's Expecting A Girl [Pictures]

The actress has also just enjoyed her first night of uninterrupted sleep since her daughter’s arrival thanks to her future mother-in-law. “Wlad’s mom was desperate to take the baby for a night,” she told People. “She looks like she didn’t get much sleep, but I feel well-rested!”.

The couple (along with baby Kaya) appear in the January 12th issue of People, on newsstands January 3rd.