Actress Olivia Munn has dismissed rumours she is engaged to football player Aaron Rodgers.

The Mortdecai star has been dating Rodgers since May, 2014 and editors at OK! magazine recently reported the couple became engaged over the holidays.

However, Munn has now taken to Instagram.com to share a text message conversation with her mum, in which she assures her the reports are not true, insisting if they were she would inform her personally.

"Answering yes or no to personal questions can be tricky because if you say 'No' it means whenever you say 'No comment' that kind of becomes your default 'Yes'," she writes on the social media site. "But since I'm doing press for the next few days, I didn't want to have to answer the same question over and over. So instead, I'm going to let my text conversation with my Asian mom help me out."