Victor Alli as John Stirling and Masali Baduza as Michaela Baduza in the season three finale of "Bridgerton."NetflixSouth African actor Masali Baduza joins the cast of "Bridgerton" as Michaela Stirling. Baduza makes her first appearance in the season three finale. The actor previously starred in "The Woman King" and the TV series "Noughts + Crosses."Warning: Major spoilers ahead for season three of "Bridgerton" and the book "When He Was Wicked."The season three finale of "Bridgerton" gives Colin Bridgerton (Luke Newton) and Penelope Featherington (Nicola Coughlan) their happy ending, heavily implies which sibling from the titular family will get the spotlight next, and introduces a fresh spin on a fan-favorite character from Julia Quinn's novels.The finale, released on Thursday, features the first appearance of John Stirling's (Victor Alli) cousin, Michaela Stirling (Masali Baduza).