Who played the role of Beth Harmon in Netflix's Original TV Series - "The Queen's Gambit"?

"The Queen's Gambit" is a fictional story over 7 episodes on Netflix, follows the life of a female orphan chess prodigy in America - Beth Harmon (the young version of whom was played by Isla Johnston and the adult version being played by Anya Taylor-Joy), during her quest to become the world's greatest chess player while struggling with emotional problems and drug and alcohol dependency. The story begins in the mid-1950s and proceeds into the 1960s during the cold war when the world of chess was dominated by Russians and Men.