United Kingdom, Aug. 20 -- Jack Coleman has paid tribute to his Heroes co-star Hayden Panettiere in a heartbreaking message after her death.

The 36-year-old actress passed away earlier this week (16.08.26), and tributes have been flooding in from those in the entertainment industry - with Jack one of the latest.

The actor worked closely with Hayden on Heroes, with the pair playing father and daughter Noah and Claire Bennet on the hit show, and issued a lengthy statement on his social media pages following the screen star's death.

Alongside a series of pictures of himself and Hayden, Jack said he's "heartbroken" by her passing and has been struggling to pen a suitable tribute, admitting his words will be "inadequate" for the star.

He w...