British Jewish actress Bel Powley will play Miep, Jewish actor will star as Otto and Billie Boullet will take on the role of the young diarist, Anne.

Source: https://www.algemeiner.com/2023/01/03/disney-releases-first-look-of-new-miniseries-about-dutch-secretary-who-hid-anne-franks-family-during-holocaust/

Her grandmother spoke Yiddish with a heavy Irish accent and Powley said that her partner’s Dutch grandmother hid Jews under their floorboards during the Holocaust.

Source: https://www.algemeiner.com/2023/04/27/we-have-to-remember-cast-and-crew-of-new-miniseries-a-small-light-talk-about-holocaust-era-heroism/

“It’s not something you’d expect from a normal 20-something directionless party girl,” Bel Powley says of her “A Small Light” character, Miep Gies, who helped hide Anne Frank and her family from the Nazis in the 1940s.

Source: https://www.latimes.com/entertainment-arts/awards/story/2023-06-15/bel-powley-holocaust-drama-a-small-light

"She always used to say this quote which was that anyone can -- whether you are a teenager or a housewife -- turn on a small light in a dark room," Powley said.

Source: https://www.realitytvworld.com/news/small-light-star-bel-powley-miep-gies-feminist-everywoman-in-anne-frank-story-50214762.php

The couple met on the set of the 2017 film Mary Shelley, in which Booth played Percy Shelley and Powley played Claire Clairmont, Mary’s stepsister.

Source: https://www.expressandstar.com/entertainment/showbiz/2023/11/03/bel-powley-and-douglas-booth-share-intimate-details-of-glitzy-london-wedding/