Jessica Alice Cave Lloyd is an English actress, comedian, YouTuber, author and cartoonist, known for her role as Lavender Brown in the Harry Potter film series and for her shows in London and at the Edinburgh Fringe. She has also published a book of cartoon doodles called Love Sick, some of the designs in which have appeared on greeting cards. A comedic play based on her life and relationships, Sunrise, was first performed in 2019. Cave's first novel, Sunset, was published in 2021.

Dumbledore's Army is a fictional student organisation in J. K. Rowling's Harry Potter series that is founded by the main characters, Harry Potter, Ron Weasley and Hermione Granger, to stand up against the regime of Hogwarts High Inquisitor Dolores Umbridge, as well as to learn practical Defence Against the Dark Arts. It was founded in the fifth book, Harry Potter and the Order of the Phoenix.