Johnny Depp is turning back the clock with a cameo in the movie based on the show which made his name - 21 Jump Street (released March 15). Here he talks about his part in the film and looks back at his dark days and how he came to hate his teen cop character. Johnny talks candidly about his struggles with fame back then and why he gambled on not taking the usual path of a young star. In this interview done before rumours of his split from Vanessa Paradis, Johnny also talks about his struggle with the "ups and downs" of life and how all he wants is to be happy.