LOS ANGELES — Stand-up comedian-turned US cable television star Louis C.K. was named the funniest person currently working in show business, according to a list released by Rolling Stone magazine on Thursday. The Emmy-winning comedian, whose given name is Louis Szekely, is the star, writer and executive producer of the comedy-drama “Louie” on cable network FX. C.K, 45, cut his comedic teeth writing for late-night talk shows on US television. C.K. bested Comedy Central's Stephen Colbert, who plays a conservative political pundit on his satirical show “The Colbert Report” for the top spot on the list ranking the 50 funniest comedians working in the United States. Tina Fey, the creator and co-star of NBC series “30 Rock” placed third and Jon Stewart, the host of Comedy Central's news show “The Daily Show,” took fourth. Rolling Stone said the rankings, compiled by its editors, considered recent work and activity and excluded beloved-but-idle comedians. — Reuters