The Transformers: Dark of the Moon beauty and the action star, who began dating in 2010, were said to have taken a break after a series of arguments.
But speaking to the Metro at GQ's Men of the Year Awards in London on Tuesday (03Sep13), the 26-year-old catwalk queen insisted the speculation was false, stating she and The Expendables star "have never been happier".
Her representative has also issued a statement denying the rumours: "Rosie and Jason have not split and are not on a break. In fact, Rosie just got back from spending the weekend with Jason on the set of his new movie."
In a new interview with Britain's Elle magazine, Huntington-Whiteley credits the 45-year-old actor with providing her with a sense of stability.
She said, "Many models are in long-term relationships for stability. Admittedly, not always with great men, but it gives them something to come home to, something grounding. That's how I see my relationship. Well, I see it in many ways but one of the most beautiful things is that I feel at home whenever I am in the world because of him."