The girls, 6, will attend Our Lady Help of Christians Primary School in Murtoa.

Mum Allyssa Wilson said the girls were ready to go.

"They are very excited," she said.

"They are looking forward to playing in the playground the school has lovely gardens and there are lots of different things for them to do."

Lili and Ruby turned six on January 6.

"They received lots of school stuff for their birthday, so they are all organised," Mrs Wilson said.

"They also got new school shoes, which they were very excited about."

Mrs Wilson said she and her husband Craig decided not to send the girls to school a year earlier despite them being eligible.

"They weren't quite ready, so we thought we would wait another year," she said.

"They are now very eager and ready to go.

"I'm feeling fine about sending them when they are ready it makes it easy."

While the girls look alike, they are not identical twins.

Mrs Wilson said they were quite different.

"It won't take long for people to get used to them and their differences," she said.

Mrs Wilson said she was looking forward to spending more time with their youngest child Pippa, who is six months old.

"I will still have one child at home for a while, but it will be good to have more quality time with her," she said.

Lili and Ruby were born four weeks premature.

"Looking after two babies was really busy and constant," Mrs Wilson said.

"But we didn't have any other children at the time so we didn't know any different."

Lili and Ruby will start school with friends from kindergarten.

"It will be nice for them to know others when they get there," Mrs Wilson said.