Knock, Knock -- Who's There? Knock, Knock Who's There? 10/24/2008 6:00 AM PT We're not entirely sure, but this 51-year-old blonde bombshell glowed as she arrived at a friend's home in L.A. on Wednesday ... and we think it's Melanie Griffith. Melanie, is that you? Share on Facebook Share on X Melanie Griffith Beauty Paparazzi Photo