Hermione Jean Granger is a fictional character in J. K. Rowling's Harry Potter series. She first appears in the novel Harry Potter and the Philosopher's Stone (1997), on the Hogwarts express as a first year student on her way to Hogwarts. After Harry and Ron save her from a mountain troll in the girls' restroom, she becomes best friends with them and often uses her quick wit, deft recall, and encyclopaedic knowledge to lend aid in dire situations. Rowling has stated that Hermione resembles herself as a young girl, with her insecurity and fear of failure.

Emma Charlotte Duerre Watson is an English actress. Known for her roles in both blockbusters and independent films, she has received a selection of accolades, including a Young Artist Award and three MTV Movie Awards. Watson has been ranked among the world's highest-paid actresses by Forbes and Vanity Fair, and was named one of the 100 most influential people in the world by Time magazine in 2015.