HOLLYWOODActress Hayden Panettiere, 25, and professional boxer Wladimir Klitschko, 38, have welcomed their first child together, a baby girl, on December 9.

Kaya Klitschko, weighed in at 7 pounds and 14 ounces.

Klitschko shared a photo via Instagram along with a caption that read, “A review on the year: The birth of my daughter, two successful championship defenses and many other achievements on the way. It was a great year and I’m looking forward to 2015. I’m ready to take on new challenges! #klitschko #steelhammer.”