Even though Doctor Strange has been filming since November, it's never too late to add a new cast member. The Hollywood Reporter reveals that The Martian star Benedict Wong has signed on to play the Sorcerer Supreme's aptly-named sidekick, Wong. It isn't known if he just recently joined the cast, or if he was part of the production when filming started last year.

Wong has a long history in the Marvel Comics, making his debut in in 1963's "Strange Tales" #110. In the comics, Wong was a disciple of the Ancient One (Tilda Swinton) who was sent to America to assist Dr. Stephen Strange (Benedict Cumberbatch) during his journey of learning the mystical arts. The character also performs healing duties and assists with occult matters. One of his primary duties is looking after the Doctor's body while he is astral projecting into other planes of existence.

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Benedict Wong joins a cast that also includes Chiwetel Ejiofor as Baron Mordo, Rachel McAdams as the female lead, rumored to be Night Nurse and Michael Stuhlbarg as Nicodemus West. Amy Landecker and Scott Adkins also star in unspecified roles. It isn't known how much longer production will last on Doctor Strange, but the studio has set a November 4 release date.

We have previously seen set photos that teased the Sanctum Sanctorum, which also featured an artifact that could be the Eye of Agamotto. In the Marvel Comics, the Doctor uses this device to defeat Dormammu. The Sanctum Santorum is a building that was built upon the site of pagan sacrifices, and before that Native American rituals, which is said to be a focal point for supernatural energies. Producer Kevin Feige recently confirmed that both the Sanctum Sanctorum and the Eye of Agamotto will be featured in this highly-anticipated adventure, teasing that the Eye of Agamotto is actually the Time Gem that fits into the Infinity Gauntlet.

Scott Derrickson is directing Doctor Strange from a script by Jon Spaihts, based on the comic book character created by Stan Lee and Steve Ditko. Aside from his role as Jet Propulsion Laboratory director Bruce Ng in The Martian, Benedict Wong also stars in the Netflix series Marco Polo as Kublai Khan, and his other prominent feature credits include Kick-Ass 2 and Prometheus. What do you think about this casting choice for Doctor Strange?