Former Lost stars Ian Somerhalder and Maggie Grace sparked dating rumours after getting cozy with each other at the popular ABC series tenth Anniversary Reunion during the 2014 Paleyfest held at the Dolby Theatre in Hollywood.

On the red carpet, the two were exchanging hugs and kisses and even sat side-by-side on the stage.

In an Instagram image posted by the Taken star, Somerhalder is seen giving Grace a kiss on the temple while she smiles closing her eyes.

":) #LostReunion," she captioned the image.

The two who played step-siblings Boone Carlyle and Shannon Rutherford on the show, are rumoured to have dated from 2006 to 2007, after their characters got killed off.

Though they never officially confirmed their relationship, Grace spoke highly of Somerhalder in an interview with the Daily Mail in August 2006.

"Talking about relationships is a surefire way to jinx them," she said. "But Ian's great, I adore him, although I'm only 22 - far too young to even think about having a serious relationship."

Somerhalder dated Vampire Diaries co-star Nina Dobrev, for more than three years, before splitting in May last year.

The two kept their relationship largely private and only acknowledged it publically in 2011. Dobrev, in an interview with Seventeen magazine, said she her priority had always been to maintain professionalism.

"I didn't want to be dating one of my costars -my goal on the show was to be professional," she said then, "But sometimes you can't help who you have a connection with, and you can only fight it for so long -which I did for a really, really long time."