Olivia Cooke

[http://dummy.us.eu.org/robert (Robert)]

She was in Sound of Metal.  That may be where we saw her previously.

https://www.imdb.com/title/tt5363618/characters/nm4972453?ref_=ttfc_fc_cl_t2

She was also in The Signal, which I saw but you did not.

https://www.imdb.com/title/tt2910814/?ref_=nm_flmg_t_24_act

You're right, 'tho: she was born and raised in Northern England, and Little Fish
was the only film in which has used her native accent.