The Australian radio and television personality, who is known for appearing on shows such as Talkin' Bout My Generation and The 7pm Project, was spotted with fashion journalist King wearing matching rings on their wedding fingers when they left for China earlier this week.
According to The Daily Telegraph, the couple are visiting the country to attend Prada's 2011 to 2012 fashion show, as Rose is the brand ambassador for Prada-owned label Miu Miu.
The pair reportedly met at a fashion shoot in May this year and started dating after Rose sent King some flowers.
Rose has allegedly been engaged before to models Catherine McNeil and Lyndsey Anne. McNeil and Rose apparently called off their engagement last year after McNeil was romantically linked to her former lover, Danish supermodel Freja Beha Erichsen.
Rose recently revealed that she loves Bikram yoga, saying that the exercise gives her a "glorious feeling".