The cast of The Matrix 4 continues to grow, this time with the addition of Neil Patrick Harris.

According to Variety, Harris will join returning cast members Keanu Reeves and Carrie-Anne Moss, as well as newcomer Yahya Abdul-Mateen II, who will play an undisclosed lead role in the film.

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Operating under the working title Project Ice Cream, little is known about the plot of The Matrix 4 at this time. However, last month, Reeves confirmed he'd seen the script and said, "It's very ambitious. As it should be!" Additionally, it was reported that studio execs may be looking to cast a younger incarnation of Morpheus for the planned sequel.

Officially confirmed to be in active development in August after years of rumors and speculation, the fourth Matrix is expected to begin principal photography in early 2020, though no release date has been announced by Warner Bros.

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"Many of the ideas Lilly and I explored 20 years ago about our reality are even more relevant now," Wachowski said when the film was announced. "I’m very happy to have these characters back in my life and grateful for another chance to work with my brilliant friends."