Rumours that Ukrainian boxer Wladimir Klitschko has proposed to his girlfriend Hayden Panettiere have intensified after the actress was spotted wearing an apparent engagement ring.

Reports that the couple are engaged have been rumbling for some time since the pair rekindled their romance earlier this year.

Hayden was photographed sporting a ring on her wedding finger while walking through LAX airport and stopping to sign autographs for fans.

The couple are yet to confirm or deny reports that they are engaged.