At San Diego Comic-Con 2016, Nyong'o was confirmed for the film, in the role of Nakia, while Jordan's role was revealed to be Erik Killmonger. Also announced was Danai Gurira as Okoye. Coogler confirmed that filming would begin in January 2017.[28][29] Additional casting occurred from September 2016 until the start of filming, with Winston Duke cast as M'Baku, a role that Yahya Abdul-Mateen II had also tested for;[108] Forest Whitaker as Zuri; Daniel Kaluuya as W'Kabi;[35] Angela Bassett as T'Challa's mother, Ramonda;[39] Sterling K. Brown as N'Jobu;[46] and Letitia Wright in an unspecified role.[109] Florence Kasumba was revealed to be reprising her role as Ayo from Captain America: Civil War.[35] Amandla Stenberg, who is bi-racial and light skinned, was considered for a role in the film but was not comfortable taking the place of a dark-skinned actor, and described her decision to pass on the role as "really challenging".[110] By January 2017, Marvel received permission from the Oakland, California-based public transit agency AC Transit to use their logo in the film for the opening flashback sequence.