Up to 10 million American adults have attention deficit hyperactivity disorder (ADHD)also commonly referred to as ADDso it's no surprise that some of America's most acclaimed athletes, actors, and musicians make up part of that mix. Left untreated, the disorder is characterized by poor concentration and disorganization, and can lead to emotional and social problems.
About 60% of children diagnosed with ADHD will continue to experience these symptoms well into adulthood. And some people with the disorder don't receive an official diagnosis until middle age.
See which celebs have suffered with an ADHD diagnosis since childhood, and which have learned to manage their disorder as adults.