Grayson Dolan, left, and Ethan Dolan attend the MTV EMAs 2017 held at The SSE Arena, Wembley on Nov. 12, 2017 in London, England. Jeff Kravitz / FilmMagic. Jan. 23, 2019, 2:23 PM EST.

1. They don’t know whether they’re identical. Credit: The Dolan Twins “We’ve asked all different doctors, and they’ve given us all mixed answers,” Grayson says.