Model and actress Sophie Monk is stepping down from her role as a co-host on one of Australia's biggest breakfast radio shows after just one year on air.

The blonde beauty joined former Spice Girls star Melanie Brown and longrunning DJs Merrick Watts and Jules Lund on Sydney's 2DayFm last year (13), but she has since decided to walk away from the job once her one-year contract comes to an end.

Her management representative tells Sydney's Daily Telegraph, "We gave notice on Sophie's behalf recently after she carefully re-evaluated her position on the breakfast team.

"She has enjoyed the role but felt she needed to move on and seek new challenges."

Monk's exit comes just three months after Brown also quit the radio show.