Jennifer Aniston and Vince Vaughn are to appear kissing on the front cover of a magazine tomorrow.
The photograph possibly confirms that their relationship has grown romantic.
People magazine publishes the photos, taken last week in Chicago, in its October 31 issue, on US newsstands tomorrow.
Reports have swirled for months that the two actors were an item. Previously, though, it was impossible to separate fiction from reality since they were at work filming The Break Up.
This time, the co-stars were without a film crew while they spent several days together in Chicago.
A call to Aniston’s publicist was not immediately returned.
Her divorce from Brad Pitt became final on October 2, concluding four and a half years of marriage.
Vaughn co-starred earlier this year with Pitt and Angelina Jolie in Mr & Mrs Smith”.
It was then that reports of a romance between Pitt and Jolie began, which were later corroborated by photographs and public spottings.
In interviews, Aniston, 36, has denied a relationship with Vaughn, 35. In this month’s Elle, she said: “He’s delicious and funny … but I don’t want to be a rebound girl.”
Last month, she said on The Oprah Winfrey Show that she was ready to date again. In response to Winfrey’s query about Vaughn, Aniston responded, “Oh, Oprah!”
Aniston will next star in Derailed with Clive Owen.
The Break Up is scheduled to hit US cinemas in February. Vaughn’s screen credits include Swingers and Wedding Crashers.