The Herald Sun is giving Hawks fans the chance to buy an original Mark Knight sketch of Hawthorn Captain Luke Hodge.

All money raised from the online auction will go towards the Royal Children's Hospital Good Friday Appeal.

The framed image shows an original sketch of Hodge next to the colour print caricature as depicted in Mark Knights’ 2011 AFL Collector Card series.

Hawks fans can bid online now for their chance to purchase the piece of memorabilia.

Bidding closes at midnight on Sunday  22 May.