Emma Stone is a kissing pro, says Josh Groban

Josh Groban has described Crazy, Stupid, Love co-star Emma Stone as a "pro" at kissing scenes.

The singer, who has a supporting role in the film as a romantic interest for Stone's character, told GQ that he was nervous about locking lips on screen but was comforted by Stone, who took control of the process.

Groban recalled: "At the end of one of our scenes the directors came up to us and said, 'You know, this is feeling a little goofy. Let's just try to make this more believable with a kiss at the end'.

"And I'm thinking, 'Holy s**t. That wasn't in the script. I've never kissed on camera before. What does that mean? What do I have to do? I didn't take that class in college'. And Emma's just this total pro. She pulls out her lip-gloss, and says, 'It's cherry. That cool with you?'"

Groban went on to jest the he will never forget the experience of kissing Stone, adding: "I mean, that kiss shall forever be my deer in Stand By Me, my moment alone, no-one will ever be able to treasure it but me."

Crazy, Stupid, Love co-star Ryan Gosling recently confessed that he was immediately taken with Stone, describing her as "everything, all the time".

> Emma Stone: 'I won't talk about romance'

Watch the trailer for Crazy, Stupid, Love, which opens on July 29 in the US and September 2 in the UK, below: