Photographs appearing to show Ashton Kutcher and Mila Kunis kissing and cuddling on a balcony have renewed speculation that the former "That '70s Show" stars and longtime friends are romantically involved.
In response, Kutcher, 34, tweeted Monday, "Apparently the privacy of your own home is no longer the privacy of your own home."
Kunis' spokeswoman did not return a request for comment.
"Listen, we hang out," the actress 28, said of herself and Kutcher in the August issue of Elle UK. "We've known each other for 15 years. We have mutual friends. We're comfortable with each other."
Us Weekly -- which claims the two friends became romantic this past spring -- Monday said Kutcher and Kunis sat close together at the wrap party and were openly affectionate in front of fellow partygoers. The magazine said the couple had dinner together earlier this month at the Los Angeles restaurant Soho House, where they reportedly sat on the same side of the table, Kunis played with Kutcher's hair and rubbed his shoulders, and Kutcher kissed her on the cheek.
Kutcher is separated from actress Demi Moore, who in November announced she was divorcing him following reports of his infidelity.