Oyin Oladejo (born c. 1985 in Ibadan, Nigeria)[1] is a Nigerian-born Canadian actress, known for portraying Joann Owosekun on the television series Star Trek: Discovery.

[2] She originally planned to study law, rejected it, and got a job as a ticket seller for the Canadian Opera Company,[3] where she discovered her interest in acting.

[1][3] In addition to regular theater engagements in Toronto, she played a supporting role in a short film, but otherwise had no film offers; according to her own statement in an interview, she was about to give up the acting profession.

[2] Finally, she took on the advice of her agent with a self-made video of a casting part, without knowing what production it was for, and was shortly thereafter selected for the role of bridge officer Joann Owosekun on Star Trek: Discovery.

[6][7] She received a Canadian Screen Award nomination for Best Lead Performance in a Drama Film at the 12th Canadian Screen Awards in 2024, for the film Orah.