watch 01:11 The Loop (TV) Do you like this video? Mia Cookson briefly appeared on Coronation Street as Bethany Platt for seven episodes in September 2000. The role was previously and subsequently played by twins Amy & Emily Walton. No other known parts have been credited to her. Retrieved from "https://coronationstreet.fandom.com/wiki/Mia_Cookson?oldid=316106" Categories: Coronation Street actors Community content is available under CC-BY-SA unless otherwise noted.