Ashton Kutcher has hinted his friendship with screenwriter Lorene Scafaria has turned romantic after calling her "my girl" in a Sunday morning tweet.

The actor's publicists dismissed reports of a relationship between the two last year after Kutcher took Scafaria to Pisa, Italy on vacation shortly after his wife Demi Moore announced their marriage was over.
 
The screenwriter, who previously dated The O.C. star Adam Brody, also spent time with Kutcher at the Yellowstone Club ski resort in Montana last month and they were spotted holding hands over a romantic lunch on Christmas Eve.
 
But Kutcher's spokesperson insisted, "They're just friends."
 
Now it appears friendship has turned into romance after the actor tweeted, "First official sleepover with my girl @lorenescafaria so maybe breakfast with everyone next time!"