Mila Kunis and Ashton Kutcher are inseparable.

After taking a vacation in Bali together, the pair were spotted together again on the set of Kutcher's TV show, Two And A Half Men.

They were outed by a seemingly anonymous fan, Sarah M, who stopped them and asked for pictures, then uploaded them to her Twitter account.

"Mila Kunis and me on set of Two And A Half Men tonight :)" she captioned one image.

In another, she wrote: "With Ashton Kutcher on set tonight."

There's speculation that Sarah M may be the daughter of a paparazzi member. Her flickr account is literally littered with pictures of her and celebrities. Everyone from Justin Bieber to Selena Gomez to Skrillex to Ashley Tisdale. Crazy.

[via Daily Mail]