 In late 2019, McMullen appeared in the first season of "The Masked Singer Australia" as the Prawn and he was fifth voted out of the show.On 23 January 2020, it was announced that McMullen would return to "The Voice Australia", alongside Renee Bargh, to host the 9th season of the show.McMullen was in a relationship with Crystal Reed from July 2013 to early 2019.