Spoiler alert: We give away one detail of Woody Allen’s new movie, “Vicky Cristina Barcelona” so if you don’t want to know, don’t read on. But it’s too irresistible to keep hidden, and soon somebody will spill it.

For months, ”Vicky Cristina Barcelona” has been shrouded in mystery. What it is about? Woody, shooting in Spain and not New York? Were co-stars Javier Bardem and Penelope Cruz romantically involved during the shoot? Are they still?

We still don’t know — for certain — about Penelope and Javier, but if the beautiful Spanish actress and her Oscar-winning co-star were in fact locking lips during filming in Barcelona, then he wasn’t the only one she was kissing. Her other co-star, Scarlett Johansson, felt the touch of those pouty lips herself.

That’s right. In ”Vicky Cristina Barcelona,” which had its first press screenings on Friday night at the Cannes film festival, Cruz portrays a high-spirited painter and Bardem is her former husband, also a painter. The pair have split up when Johansson’s character, a young American tourist, enters into a relationship with Bardem. When Penelope returns, well, things happen. And in one brief scene, Cruz and Johansson engage in a sensual kiss — or two. Where it leads and what happens after that, we won’t tell. But one thing is for certain, that Javier, he’s a lucky guy.

UPDATE - At Saturday’s Cannes news conference for “Vicky Cristina Barcelona,” Penelope was asked if she had any qualms or enjoyed the kiss scene and she completely dodged it. “I got that question four times today already, and I didn’t give any answer because I didn’t have a good answer,” she said. “And I was thinking every time, ‘what would Woody say if he was me in that situation.’” She looked at the director, and he didn’t answer, either.

“And I’m still not inspired to give a good answer,” she said.