(Cover) - EN Showbiz - Scarlett Johansson has been driving Justin Timberlake "wild" because she plays it so cool.

The two stars were first linked in 2007 after Scarlett appeared in the promo for Justin's single What Goes Around. Scarlett insisted they were just friends and went on to marry Ryan Reynolds, who she has since split from.

Last week it was reported Scarlett and Justin had got close again after they were spotted enjoying an intimate evening out together, and it's been claimed they are growing increasingly close.

"The thing with Scarlett is she always plays it really cool with Justin, and in a world where he has women throwing themselves at him, that seems to drive him wild," a source told Look magazine.

"I think she's got him wrapped around her little finger because unlike other girls he has had things with, she's a young, soon-to-be divorcee and won't be interested in getting married any time soon. She just wants to have fun."

Justin's relationship with Jessica Biel ended earlier this year, while Scarlett recently split from Sean Penn.

The pair were spotted at a New York nightclub together last week, where it was claimed they couldn't keep their eyes off each other. (C) Cover Media