It looks like ASHTON KUTCHER and MILA KUNIS aren't hiding their relationship anymore.  They went to a party together on Saturday, and they were kissing in front of everyone.  The paparazzi even got a picture.  (You can see it here.)  (Us Weekly)

In a recent interview, Mila said she's totally single, and she and Ashton, quote, "just hang out."  (They co-starred on "That '70s Show" together.  He's 34, she's 28.)