"It's one of those events that the honour is ever-present, it never really diminishes and the nerves are pretty up there as well but it's very exciting. I'm very grateful to have the opportunity."
Marvelly has been following New Zealand's cricket games for most of her life and is proud of how the side has stepped up for the World Cup.
"I hope that they win. But even just getting to this stage is such an incredible achievement."
One of those hoping to join her across the Ditch is her father, who she said was overjoyed to discover she was off to Melbourne.
"My dad will probably pull some kind of magic feat of flying over the Tasman somehow, maybe on a magic carpet; he really wants to see the game. I think he felt that if he couldn't have a son who could play for the All Blacks or the Black Caps then this was the next best thing," she quipped.
Marvelly, who put out her third album, Collisions, last year, said she found out only yesterday that she had been chosen for the illustrious gig, and expected to fly to Melbourne this morning.