Exclusive: Hayden Panettiere's Baby Album

The Nashville star says adjusting to motherhood "has been a surreal experience" following the Dec. 9 birth of her daughter, Kaya Evdokia, with fiancé, heavyweight professional boxer Wladimir Klitschko

DADDY'S LITTLE GIRL

The boxer "has always wanted to be a dad," Hayden Panettiere tells PEOPLE. "I think at some point he might have started thinking he wasn't ever going to be and then he was. He is just so over the moon."