Sienna, Keira's kissing techniques revealed

Matthew Rhys claims he is a better kisser than Sienna Miller and Keira Knightley.

The actor had to lock lips with the two stunning actresses for his role as Welsh poet Dylan Thomas in the movie The Edge of Love, and was most impressed by his own smooching skills.

When asked who was the best kisser in the movie, Matthew - who is rumoured to have previously dated Sienna - replied: “Me of course! We decided that by referendum. It came out unanimous.”

Sienna’s relationship with Rhys Ifans allegedly imploded because of the ‘Notting Hill’ star’s jealousy over Sienna’s close friendship with Matthew.

But Matthew, 33, denies romance blossomed on set, insisting he would never date a co-star.

He said: "There has been a lot more speculation about the whole thing than actual fact.

"On set romances are the worst idea in the world. You get caught up in the microcosm of filming, especially if you're playing romantic parts, and I'm only speaking from my own experience here, but it never really pans out afterwards."