Police have launched a five-year plan to reduce violence against women and children in Victoria.

Today is White Ribbon Day, which aims to tackle domestic violence.

About 250 police, AFL figures and community leaders have attended a breakfast at the Victoria Police Academy, with some taking a pledge to become White Ribbon Day ambassadors.

Victoria Police Chief Commissioner Simon Overland used the breakfast to reiterate his commitment to fighting domestic violence.

The new police plan includes measures to help victims of violence come forward, and more support and counselling for perpetrators of violence.

Mr Overland says police want to improve their response to sex attacks and child abuse, and work better with indigenous communities.

He says domestic violence is a huge burden on the community, with about half of all women affected by violence at some stage in their lives.

"It's an entrenched problem, it's an enduring problem," he said.

"We need to continue to focus on it and do everything that we can to eliminate violence against women and children, and the policy or the strategy that we've launched today is the new framework that will help Victoria Police achieve that."

The chief executive of the AFL, Andrew Demetriou, told the breakfast the AFL is committed to setting a positive example and taking a lead role in stopping violence against women.

"The recent news of rape charges brought against members of the Montmorency Football Club shocked all of us in the football community," he said.

"As the chief executive officer of the AFL, I want to assure you that we are acutely aware of our leadership position in the community and of our obligation to tackle this important issue."

Events to mark White Ribbon Day are being held across Victoria today.