Played by Kassandra Clementi.
Maddy is an energetic, responsible girl who shows a maturity beyond her years. She’s routine oriented and sets very high standards for herself. She also needs structure in her life, and to stay organised - if anything goes out of kilter, Maddy’s life can become a chaotic mess.
The problem with Maddy’s perfectionist outlook is that, if she doesn’t think she can succeed at something, she won’t try it. She plays it safe and she toes the line. She’s a cautious kid, a thinker. So it’s surprising that someone like Maddy would turn her back on everything and everyone in favour of running away and it’s even more surprising that it was her idea.
When Maddy and Spencer arrive in Summer Bay, they’ve been on the run for a little while, the possessions they left home with have been stolen and the money they had has long been spent. Consequently, they are forced to beg, borrow and steal to survive. When Maddy falls quite ill, she and Spencer meet Roo and Harvey, turning up on their doorstep.
As Roo becomes a trusted friend, Maddy explains that she and Spencer are not brother and sister, but are in fact boyfriend and girlfriend. Spencer’s brother Chris comes to Summer Bay, and begins to disrupt their relationship as he becomes a third wheel. In the end, Spencer and Maddy break up.
As Tamara regained her memory, choosing Kyle over Casey, Casey turned his affection towards Maddy. After Casey tries to pursue her, Maddy ends up chatting to Josh Barrett - trying to make Casey jealous.Casey tries to keep Maddy away from Josh as he believes Josh is a bad influence but this results in a fight and the Barrett brothers seeking revenge. The Barrett brothers follow Maddy and Casey in the car and tailgate them, running them off the road. Left for dead, Casey rescues Maddy but is then critically injured when the car explodes. Blaming herself for the accident but as Tamara goes to Casey’s side in hospital, Maddy turns to Josh Barrett, which is where their love story begins.