Say hello to the latest addition to The X Factor Australia judging panel - Adam Lambert.

The 34-year-old, who shot to fame after competing in American Idol in 2009, has been lined up as this year's third judge alongside Iggy Azalea and Guy Sebastian.

Lambert - currently on tour with Queen - tweeted: "Big News!!! I am going to be a judge on @thexfactor_au !!!"

"I am very excited to join X Factor in Australia and am looking forward to helping people shine their brightest," Lambert said.

"Australia has always been one of my favourite places to tour. The Aussies I've met are so kind and good humoured - so the thought of getting to live in Sydney is exciting."

The X Factor Australia returns for an eighth season later this year.