I think I'll say Anya, because I know for sure her hair length is all real because she grew it out gradually and it's a topic of discussion for her in media. Dakota Johnson looks much better with the extra length but I'm not sure if it is real or extensions, she's had fairly long hair for a long enough time it seems plausible that she actually grew it to it's current length but she definitely had extensions in the past too, I read somewhere that her stylist said that her long hair was all hers. Mikey Madison has been in the spotlight for less time so I'm not sure on the plausibility of her hair length based on the past but I did read that she was wearing extensions for the movie Anora and for some public appearances.