Wladimir Klitschko's actress fiancee Hayden Panettiere is reportedly pregnant with the couple's first child.

The Ukrainian boxer is believed to have been engaged to the 24-year-old American star for around a year following an on-off romance.

The couple first began dating in 2009, but later split in 2011 before rekindling their relationship.

According to Us Weekly, Panettiere, who has previously revealed a desire to raise a family, is pregnant with her first baby.

The pair were forced to postpone their wedding due to the civil unrest in Ukraine earlier this year.