In Cannes to promote their new romantic comedy "Two Weeks Notice," Grant and Bullock were all flirtatious asides and sexual innuendo, stoking talk that the loveable rogue may finally have found love after Liz Hurley.
"Sandy is in love with me, and I really like Sandy, but for me it's just a sex thing," Grant, 41, quipped when asked about rumors of a relationship.
Bullock, the star of "Speed" and "A Time to Kill," didn't miss a beat, saying: "I really like Hugh, but I'm just not ready to have sex yet. We've held hands and kissed a couple of times, but we haven't done the sex thing."
The rumor mill has been spinning since the couple turned up at the Oscars together and flirted outrageously for the cameras, with Grant feeding his companion chewing gum and joking that Bullock, 37, was expecting his baby.