Gregory Stuart Lynn, 57, is on trial for the alleged murder of Russell Hill, 74, and Carol Clay, 73.

Lynn has entered a plea of not guilty to the charges.

The trial, taking place in the Victorian Supreme Court, has convened a 14-person jury.

The accusation involves the shooting of the campers in March 2020 in the Wonnangatta Valley.

Duration of the trial is anticipated to be 4-6 weeks with potential testimony from up to 112 witnesses.

This is Victoria's first trial to be covered in real-time via a dedicated podcast, 'The Missing Campers Trial.'

Dermot Dann KC is leading the defense for Lynn, while the prosecution is headed by Daniel Porceddu.