(Cover) - EN Showbiz - Kristen Stewart and her boyfriend Robert Pattinson were enamoured with each other at the 2012 Cannes Film Festival.

Kristen premiered her upcoming film On the Road Wednesday night at the event and Robert lent his support.

The pair appeared extremely cozy with one another at an afterparty.

"They looked really comfortable, sitting closely and chatting," an eyewitness told Us Weekly. "He was talking to her and not paying attention to anyone else. Every now and then she would laugh and he would smile at her."

The pair managed to socialise with others for a short amount of time, but they isolated themselves again shortly thereafter.

"They squeezed themselves in to the furthest corner of the sofa possible," the source revealed. "They were talking closely but every now and then Kristen would show him the screen of her phone and he would make a face or laugh. He then took over the chat and she was listening and nodding and then suddenly giggling. It looked like he was telling her jokes."

"Rob and Kristen were singing along to Hit The Road Jack and got really into it. Both were sitting close, and after the song finished, she nuzzled her head on his shoulder. She put her hand on his chest. They then kissed--several times." (C) Cover Media