**** Warner Bros. has unveiled the complete cast for the highly anticipated "The Matrix 4," and among the new additions is "Sleepy Hollow" star Christina Ricci, who will play a mysterious and undisclosed role. Ricci joins a stellar lineup including Yahya Abdul-Mateen II, Priyanka Chopra Jonas, and Neil Patrick Harris, alongside returning franchise stars Keanu Reeves and Carrie-Anne Moss, reprising their iconic roles as Neo and Trinity. The film, directed by Lana Wachowski, promises to continue the groundbreaking narrative that has defined the "Matrix" series. Notably, franchise veterans Daniel Bernhardt and Lambert Wilson are also expected to return as Agent Johnson and The Merovingian, respectively.