The couple were seen outside the Paramount Bar and restaurant in the capital, holding hands as they walked down the steps. They let go as soon as they spotted the waiting photographers, but the smiles on their faces gave the game away.
Singer Mel, 39, split from her partner of ten years Thomas Starr in 2012 – the pair have a four-year-old daughter Scarlet together. Most recently she was linked to Matt Cardle, and the two shared a very intimate kiss in the video for their duet Loving You.
Capital FM DH Greg, meanwhile, was previously linked to Apprentice star, and Celebrity Big Brother housemate, Luisa Zissman.
He is also rumoured to have dated stars including Girls Aloud singer Sarah Harding, X Factor’s Katie Waissel and TOWIE’s Mariah Fowler.