Benedict Cumberbatch Dr. Stephen Strange / Sinister Strange / Defender Strange Elizabeth Olsen Wanda Maximoff / The Scarlet Witch Chiwetel Ejiofor Baron Karl Mordo Benedict Wong Wong Xochitl Gomez America Chavez Jett Klyne Tommy Maximoff Julian Hilliard Billy Maximoff Sheila Atim Sara Adam Hugill Rintrah (voice) Michael Stuhlbarg Dr. Nicodemus 'Nic' West Rachel McAdams Dr. Christine Palmer Hayley Atwell Peggy Carter / Captain Carter Anson Mount Blackagar Boltagon / Black Bolt Lashana Lynch Maria Rambeau / Captain Marvel John Krasinski Reed Richards / Mr. Fantastic Patrick Stewart Professor Charles Xavier / Professor X Charlize Theron Clea Bruce Campbell Pizza Poppa Ross Marquand Ultron (voice) Ako Mitchell Charlie Momo Yeung Hong Kong Master Topo Wresniwiro Master Hamir David Tse Kamar-Taj Teacher Joshua Peace NY Passerby 616 Cecilia Appiah Waitress Michael Waldron Charlie's Best Man Bridget Hoffman Soul of the Damned (voice) Scott Spiegel Soul of the Damned (voice) Andrew Morgado Soul of the Damned (voice) Audrey Wasilewski Soul of the Damned (voice)