Anya Taylor-Joy has joined the upcoming Lord of the Rings: The Hunt for Gollum as an original character called Seren. She is a Sindar Elf of the Woodland Realm who is described as "a trusted and lethal agent of King Thranduil."
Lee Pace's Thranduil has already been confirmed to be returning, alongside Andy Serkis as Gollum, Ian McKellen as Gandalf and Elijah Wood as Frodo. Taylor-Joy joins newcomers Kate Winslet, who'll be Marigol, Jamie Dornan, who is playing Aragorn/Strider, and Leo Woodall, who has joined as Halvard.