On paper, Ken Jeong looks like a typically high-achieving Asian-American. The son of Korean immigrants to the US - his father was a university professor - Jeong was part of his high school's High IQ team, played violin in the orchestra, graduated early and went straight on to study pre-med at Duke University. He got his medical degree and became a tenured-for-life partner in a thriving medical practice in Los Angeles, making, as he now recalls, 'a solid six figures'. But as his more recent foray into the world of acting has proven, there is a slightly dark side to Jeong, an unhinged, fearless sense of humour, that has led to him becoming a in-demand comedic actor. In the first Hangover, it was his idea to have his character, Leslie Chow, jump out of the trunk of a car naked. In fact, that entire personality - menacing, borderline psychotic, spewing hysterical profanities - was a product of Jeong's own imagination. 'Chow is the best character I've ever played,' says Jeong, wearing a blazer and collared shirt and sipping green tea one morning in a Beverly Hills hotel. 'He's so much fun. It gave me the confidence that I needed as an actor. I would love to do this character for the rest of my life.' Jeong reprises his role as Chow in The Hangover Part II, and says he was 'through the moon' when told by director Todd Phillips that he would have an even bigger role in the sequel. Jeong fashioned Chow from a variety of influences. He took the collective accent of his Vietnamese wife's family, fused it with that of his own Korean heritage, added a high-pitched squeak, reimagined Joe Pesci's character in Goodfellas and Heath Ledger's Joker in The Dark Knight and concocted an out-of-control nemesis who is as much at the comedic core of the movie as its three hungover stars. 'If you do a movie like this, anything mild is offensive. If you sell yourself short in any aspect, that to me is far more offensive than anything you could ever do in the movie,' he says. The attention Jeong received from The Hangover helped put him on the fast track to a thriving Hollywood career. At the urging of his wife, also a doctor, and with whom he has twin three-year old girls, he quit medicine about five years ago to devote himself to acting. Until then, he was a regular on the stand-up circuit. He's now a regular on the hit sitcom, Community, where he plays a menacing Spanish teacher. This summer, he will be seen with Kevin James in Zookeeper and is also in the next Transformers movie. He's still a licensed doctor, having renewed his credentials, and says both disciplines have helped one another. 'I was told that I'd be a better doctor because of my comedy, but didn't know that I would be a better comedic actor because of my medical background. I think it's the discipline I learned, being up for 36 hours at a time. Nothing is harder than being a resident doctor. And I think what I realised is that I loved being part of a great team. I don't know if it's my medical background, but I'd rather be a small part of a great team than a great part of a bad team.'