Thomas, you asked me not long ago about Heath's siblings... I know this photo was posted before, but I finally found out who's who:
Heath and his sister Kate, the two little girls are his half sisters Olivia (in Kate's lap) and Ashleigh (lower right). The photo was taken in 1999, btw.

Heath and his sister Kate were named after the characters in Emily Bronte's novel "Wuthering Heights", Heathcliff and Catherine.
