The couple will marry in Sydney but are keeping the wedding "super secret" to protect an exclusive magazine deal, reports Sydney Confidential.
According to a soap insider, the invitations only included a date and a note reading "more details are to follow".
"Guests will be contacted in the morning on the day and given the time and location. I believe it's at night so there will be plenty of time to prepare," the source said."It's getting harder to keep private things private."
Their marriage could come almost a year after Ewing, who plays Heath Braxton in the soap opera, was charged with assaulting Little.
Those charges were later dropped after he pleaded not guilty.