This chapter concerns the activity of professionals connected with the casas da ópera and the various specializations involved in providing theatrical entertainment to the urban population of Portuguese America. Individual sections focus on singers and actors, music directors, music instructors, instrumentalists, choreographers, dancers, stage producers, playwrights, and managers. The largest section, dealing with singers and actors, raises a variety of issues related to social mobility, training, race, gender, and trans-Atlantic circulation of artists. Lengthier discussions address prevalent practices of cross-dressing onstage, the social status of artists in Portuguese America, the role of mixed-race artists in the performing arts in the colony, perceptions and social mobility of female singers, and controversies regarding religious and secular authorities. This chapter also updates biographical data of several artists, some of them previously unknown in musicological research.