National Mental Health Commissioner Lucy Brogden AM will be in attendance along with John Brogden AM, Lifeline chairman, who will give the assembled crowd an insight into the challenges Lifeline faces.

The couple has been involved in the community in a range of roles for most of their adult lives and Mrs Brogden was appointed to the Order of Australia as part of the Queen's Birthday Honours in June .

"In the last figures released we saw a nine per cent year on year increase for Australians who died by suicide," Mrs Brogden said.

"And sadly, more people die by suicide in rural and regional Australia than the cities."

Mr Brogden said Lifeline in the Central West and across Australia relied on the generosity of individuals and communities to do its life-saving work.

"I want to thank the people of Dubbo and the region for their support," he said.

"Every dollar raised will help us save more lives."

Fundraiser committee chairman Mathew Dickerson was incredibly appreciative both Mr and Mrs Brogden would able to attend.

"One of our organising committee knows both Lucy and John personally and as soon as they were aware of the dinner through this personal connection, they had organised to attend immediately," he said.

"I admire their ongoing commitment to mental health issues in this country and I look forward to their contribution on the evening.

Tickets are now on sale through 123Tix or available from axxis in Dubbo Square.

The event will be held on Friday July 12 at Rhino Lodge.

Support for the Lifeline fundraiser is continuing to grow with sponsors coming on board, businesses and people donating auction items and ticket sales progressing well, organisers report.

Thirsty Merc's Phil Stack will be part of a jazz duo entertaining crowds as they arrive and the guest speaker is radio personality Alan Jones AO.