The Australian actress, who is best known for her role as Sophie Wong in Winners and Losers, exchanged vows with Kingston in front of 50 family members and friends in a top-secret ceremony this week.
According to Adelaide Now, the couple were spotted wearing new wedding rings as they headed off on their honeymoon from Tullamarine airport yesterday.
Vallejo and Kingston recently threw media and fans off the scent by giving an exclusive interview about their engagement to Woman's Day magazine.
She said of her now-husband: "Matt really is the perfect man. I didn't know all of those wonderful qualities could exist in one person. With each day, I find myself thinking, 'Oh my God, you are even better than I thought!'"
Kingston has said of Vallejo: "Everyone knows her for being so beautiful and talented and all the rest of it, but what I love about Mel is that she is completely unaware of that beauty and talent."
She also admitted that she wasn't a "big marriage person" before she got engaged and started planning her wedding.
Earlier this year, the 31-year-old said that she felt very "lucky" to have landed a part in leading television series Winners and Losers. The show later debuted to strong viewer ratings.