"It was a real honour having the Harcourt family here opening the centre. Dame Kate gave a lovely speech and then sung the school hymn from when she was here at school."
About 40 old girls joined with Ms Harcourt from the audience to sing the hymn.
"It was very special for us to watch," Ms Johnson said.
Alongside this new performing arts centre renovations commenced last January inside the Woodford Building, which included a new kitchen, laundry, extended dining room and outdoor deck for Year 13 students.
The Bernard L Chambers Founders' Room was also developed as a multi-purpose space for the Woodford House community to use.
Around $6 million has been invested into these building projects and Ms Johnson said they were grateful for the generous support of their community.
"We would like to especially acknowledge and thank the Chambers Charitable Trust for their substantial contribution in supporting Woodford House as a leading school for girls."