The 2nd of April is World Autism Awareness Day - a day dedicated to raising awareness and celebrating the people whose lives are touched by autism.
Autism is thought to affect four times as many boys as girls, but the latest research suggests it might be a more even balance - it is just that it takes girls longer to get diagnosed because they show different symptoms.
Sophie Walker and her daughter Grace have shared their experience with ITV1's Daybreak.
Over half a million people in the UK have autism - that is around 1 in 100. The prevalence rate is the same across all age groups.
Over 90,000 school age children (4-16) are thought to have autism in the UK.
Mozart, Einstein and Andy Warhol are among those famously believed to have had the condition.
You can get more details on autism here.