Portrayed by:
Thomas Malios
12-13 (Season 2)
First Appearance:
Last Appearance:
Nate (older brother)

Billy is Nate's little brother in H2O: Just Add Water, played by Thomas Malios.


Nate trains his brother, Billy, and other boys in soccer. The team also includes Emma's brother Elliot. Billy is the team captain and constantly harasses Elliot during the training and even during a play. Billy even went as far to trip Elliot, who was in his own team to get the ball from him, so Billy himself could try to score. Eventually, Emma got fed up with Billy's behavior and created an ice slide and made him trip. This gave Elliot the chance to score a goal.


  • Billy appears only in one episode.

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