WHO said Elvis was dead? Yesterday morning I met Mr Presley in a luxury Mid-Levels apartment and, believe you me, he's never looked younger. The old touches were unmistakable: the snarling lip, the swivelling hip, the swaggering bodywork - they were all in good working order. And the trembling passion-wrapped voice - as I discovered when he gave me an impromptu rendering of his favourite, Love Me Tender - was in superb shape, too. So what's he been up to, of late? ''I've been touring the States and Canada with a show called Legends in Concert,'' he drawls. ''Marilyn Monroe opens the show and I go on for an hour-and-half. It opened in Broadway, and in the past three months we've been playing Honolulu, from where I've taken a brief break to come to Hongkong.'' This particular manifestation of Elvis, although his passport bears the name Tony Roi, is here to entertain at the DeLaneau-sponsored charity gala in aid of the Hongkong Marrow Match Foundation tonight at the Grand Hyatt ballroom. By Roi's own estimation, there are around 2,000 ''serious'' Elvis impersonators on the international cabaret circuit. But if plaudits that have come his way from the Presley - as in Elvis Aaron - family are a guide, Roi is the world's leading ''imitator'' (he shirks from using the I-word) of The King. He was chosen by Elvis's wife, Priscilla, to appear alongside her in the TV movie Elvis And Me and soon will be appearing in a video with the rock legend's daughter, Lisa, who is launching her own singing career. There's more. In August he will star alongside Sylvester Stallone in a movie titled Me and My Elvis. Roi, himself, never got to meet his hero. He had just turned 17 when Elvis died in 1977. But when he was doing his Elvis act in Virginia a year later, Elvis's father, Vernon, who happened to be in the audience, was taken aback by Roi's resemblance to hisson and invited him to visit the family at Gracelands. Says Roi: ''From the earliest days I was fascinated by Elvis's style - both in voice and manner. Although he has become the key element in my show business career, I will be releasing an album of my own songs soon as I now want to establish myself as Tony Roi, the entertainer.'' Meanwhile, he's happy to ride on the Presley wave. Within hours of arriving in Hongkong he learned his first Cantonese words when travelling on the MTR. Quite a few people were calling out Mah Wong at him, which he's since discovered is how Elvis is referred to in the local dialect.