Hayden Panettiere and her fiancé Wladimir Klitschko have welcomed a daughter to the world.

The petite 25-year-old star of Heroes and Nashville gave birth to Kaya Evdokia Klitschko - who weighed in at 7 lbs 14 oz and measured 20 inches.

Her father is 38-year-old heavyweight boxing champion Klitschko - and the couple got engaged in October 2013.

The pair told People magazine: "We are over the moon and madly in love!"

Panettiere revealed the gender of her baby back in August, telling reporters: "I'm thrilled for her to come out."