Tamworth Musical Society's production of the ABBA extraordinaire was scheduled for May this year but in a crushing blow, the Capitol Theatre curtains were forced to close indefinitely amid tighter restrictions to curb the spread of the COVID-19 pandemic.
The society confirmed the show will go on, with opening night set to be March 5, 2021.
The musical will be performed 13 times before finishing up on March 20, 2021.
Ticketholders will be contacted by email or phone as soon as possible.
Ms Stuart and Mr Hubbard are from Gunnedah, and said all of the dances they have choreographed to date, scenes and blockings have been videoed to make it easier when rehearsals kick off again.
"What we hope is that on the other side of this pandemic that's changing all of our lives at the moment ... something bright and colourful and happy like Mamma Mia! is going to be the perfect antidote," she said.
"And we hope that what will happen is that everyone comes to see it and it's uplifting and joyful and helps to bring people together again when that's possible."
Ms Stuart and Mr Hubbard are in the ensemble of Mamma Mia! and had been spending plenty of time on the road for rehearsals.
"It's a lot of time on the road and away from our families but we are doing this because we love it," Ms Stuart said.
"At one point I'm a Greek tavern worker. Later, I'm part of a raucous hen's party," Ms Stuart said.
The optometrist said dancing is Mr Hubbard's "strong suit" and he's "loving every moment" of the musical.
"I have to say this is the most dancing I have done for a musical ever," Mr Hubbard said.
"I've met new people who I didn't know in Tamworth had a musical hobby, and put dedication into what they do. Being surrounded by these people has been the best thing for me right now."
Ms Stuart said it was "interesting to watch all the different components come together".
"It's like a great big puzzle. The director, Peter Ross, along with musical director Tim Godden and choreographer Kristi Cini, can really see the big picture and are doing an amazing job building the show," she said.
"The energy is so positive and has been right from the start.
"This is a show - and a bunch of people - with a lot of heart. We can't wait to welcome everyone to the island."