Bradley Cooper and Scarlett Johansson are reportedly dating.

The Hollywood pair sparked rumours of a romance last year and played lovers in the 2009 comedy He's Just Not That into You.

According to reports, Bradley and Scarlett have now allegedly enjoyed a "fun, flirty dinner" together - adding fuel to speculation they are indeed involved.

Radar Online reports that the stars shared a candlelit dinner at the Bel Air Hotel last week.

"They seemed very comfortable together and it was pretty obvious they are into each other," a source told the US website. "Bradley seemed almost distracted by Scarlett's beauty, especially since she was wearing a very low cut dress, and Scarlett was totally working her charms. She kept flipping her hair when she laughed at his jokes.

"The chemistry between them was very evident and they looked totally wrapped up in each other - very cute! They were definitely having more than a 'friends' dinner, it seemed pretty obvious they totally have the hots for each other."

Bradley recently split from actress Zoe Saldana, and has previously dated Rene Zellweger. He's also been romantically linked to Jennifer Lopez, Cameron Diaz and Olivia Wilde.

Scarlett is divorced from actor Ryan Reynolds. She has been romantically linked to Sean Penn and has been dating New York City-based advertising executive Nate Taylor most recently.