Hayden Panettiere and Wladimir Klitschko are 'secretly engaged'

ust two months after rekindling their romance, Hayden Panettiere and Wladimir Klitschko are engaged, it has been reported.

The 23-year-old Nashville actress and her 37-year-old athlete beau have yet to comment on the reports, or even that they are back together, but have been seen indulging in several PDAs since they reunited in January.

A source told Usmagazine.com: 'Very few people know, and she isn't wearing her ring publicly yet.'

And now Hayden and Wladimir are engaged, they are already planning their nuptials - with the wedding tentatively set for later this year.

The source added: 'Looks like a summer wedding!'

The engagement reports come after the couple were spotted kissing at the Miami Heat game in Florida on Sunday.