Justin Long has insisted that Drew Barrymore is a "great kisser".

The actor, who co-stars with his on-off girlfriend in Going The Distance, also claimed that he didn't have to adapt to Barrymore's kissing during filming because he was already accustomed to her style, reports STV.

"[Barrymore's] a great kisser... I just want to reiterate that. Sometimes it can be a surprise when you've never kissed anyone before and you've just met recently and people have different ways of kissing and sometimes it can be very jarringly uncomfortable," the 32-year-old said.

"There can be very little movement involved and then a quick, sudden movement from the tongue that you don't expect."

Going The Distance is released in the US on September 3 and the UK on September 10.