McMullen returns to the show after having hosted the first four seasons of The Voice Australia as well as The Voice Kids. He is also known for roles on House Husbands and SeaChange.
McMullen said: “I’ve hosted a lot of fun shows around the globe since leaving but nothing compares to the buzz you get from walking out onto The Voice stage.
“The seasons that I hosted were the most fun I’ve ever had in television, and I can’t wait to pick up the reigns again to front the biggest show in Australia.”
Bargh spent the past decade as a host on Emmy award-winning US entertainment show, EXTRA. She returns home to star on Australian TV for the first time in ten years.
Bargh said: “It’s an absolute dream come true to be heading home to Australia and joining The Voice family.
“When it comes to entertainment television, it doesn’t get much bigger or more dynamic than The Voice. I’ve always been a huge fan of the show and am looking forward to meeting the next wave of incredibly talented Aussie artists”.
For the first time, all four Coaches will return with Kelly Rowland, Guy Sebastian, Delta Goodrem, and Boy George all gearing up for another round of auditions.