The former Neighbours actor, who co-stars with Ventoura in new Australian western drama Wild Boys, announced during a TV interview with Rove McManus that he is in a relationship with "a lady".
McManus asked MacPherson on his new chatshow Rove LA: "When you are with the new girlfriend... whoops, can I say that, am I allowed to mention that?"
MacPherson then responded: "You can actually. We have been keeping it very... yes, I do have a lady." The camera then panned to Ventoura, who was smiling as she watched him from the audience.
The couple have refused to talk about their relationship since they were first linked in August. They did, however, comment on their great "chemistry" as on-screen lovers with MacPherson saying: "It is pretty easy to see."
Ventoura kept her last relationship with Bondi Vet star Chris Brown very private and never commented on their split, while MacPherson separated from girlfriend of three years Kristi Townley last year.
Wild Boys airs on Sunday nights at 7.30pm on Channel Seven.
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