Star Trek: Discovery is an American television series created for Paramount+ (originally known as CBS All Access) by Bryan Fuller and Alex Kurtzman. Set roughly a decade before the events of the original Star Trek series and separate from the timeline of the concurrent feature films, Discovery explores the Federation–Klingon war while following the crew of the USS Discovery. It premiered on September 24, 2017.
The series stars Sonequa Martin-Green as Michael Burnham, a Starfleet mutineer who is given a war-time field assignment as a science specialist on the USS Discovery and the adopted sister of original series character Spock. Doug Jones, Shazad Latif, Anthony Rapp, and Mary Wiseman round out the main cast. They were joined by Jason Isaacs for the first season and Anson Mount for the second. Characters seen previously in Star Trek also appear in recurring roles, including Spock's father Sarek, portrayed by James Frain, and Harry Mudd, portrayed by Rainn Wilson.
The following list includes Star Trek: Discovery's main cast, as well as all guest stars deemed to have had recurring roles throughout the series, and a supplementary list of other noteworthy guests.