Ralph Lauren falls on lower-than-expected Q3 revenue forecast

** Shares of Ralph Lauren RL.N fall ~8% to $378 premarket

** Co forecasts third-quarter revenue largely below analysts' expectations amid a broader luxury slowdown

** RL expects Q3 revenue to grow in low- to mid-single digits on a constant-currency basis, centered around 3% to 4%, below analysts' estimate of 4.27% growth

** However, co beats expectations for Q2 revenue and adjusted earnings per share, raises annual revenue and profit margin forecasts

** Up to last close, RL up about 17% YTD