Hayden Panettiere flashed a mysterious new tattoo on her back at the weekend.

The Heroes star showed off some italic lettering whilst at the Save The Whales Again rally - where she received an award for educating the public about Washington's ineligibility to vote as a state.

This is the second form of body art the young actress has got done - she already has a tat of the Leo symbol on her ankle.

Hayden reduced her mum to tears when she got the first symbol done aged 18 without her folks' permission.

We wonder wahat mummy Panettiere will make of Hayden's latest ink...

See more of Hayden's newest tattoo below