Dating the enermy
And Claudia Karvan also plays both characters, because an extraordinary thing happens one night while they're asleep: they switch bodies.
Tash had been wishing Brett could be in her shoes, see things her way. But in the process, she is landed with his body..his job as a host on a tv music show, and his everything.
After a shaky, nervous two weeks in rehearsals, Guy and Claudia welded as actors.
"I had to be talked into doing it," Guy admits, "so I was always on the edge, feeling I couldn't do it.
They were first seen together in January, and made their romance public when Greg accompanied Sheridan to the National Television Awards in London.
Of course, during filming, Guy was acutely aware of the irony of making a film about a relationship in danger as a result of a lack of communication, of understanding the other's point of view. And then there was the Priscilla factor: "My initial reaction was, oh god, they're going to see this and think 'Priscilla... I was also aware of the marketing aspects, the image...ooh, I can't be seen in a dress again, I must go and do something butch.According to reports, the dedicated duo designed their own "All in" pair of aces, which Sheridan had inked on her ribs and Greg on his upper arm.