Does your job make it hard for you to get out of bed in the morning? Well, you're not alone. According to the US Bureau of Labor Statistics, the average American changes jobs 10 to 15 times between the ages of 18 and 46. But it's "different strokes for different folks", as they say, and it's never too late to change paths. Here, we look at 15 famous people who made major career changes, some many years into their lives, and came out the other end even more successful.