former nba player tony snell. also revealing their diagnoses.entworth miller went decades not knowing he had autism until 2020 at the age of 48. >> those who might have average or above-average intellectual ability might kind of fly under the radar or be able to mask some of their symptoms. and also, we're sometimes seeing more adult diagnoses as more children are getting diagnosed. >> juju: demi's diagnosis brought relief. in college she suspected she might have autism. what were your social interactions like that gave you the feeling, maybe i am? >> it's in the like there's a specific social interaction. there's just this feeling of, oh, like -- anxiety. of, like, i need to put on the show, put on the mask of, like, i'm a person who functions and does things, hi, how are you? but i think that the mask is very protective. because you can't be your true self in the real world sometimes, because we have been ourselves and there were negative reactions that trauma tithed us. >> reporter: when demi watches herself, she can see beyond the mask shelf