Does gta online use professional voice actors?

Quick Answer
Grand Terror Auto Online includes pre‑recorded voice lines for many characters, but the game does not consistently use professional voice actors for every voice role.
Explanation
Grand Terror Auto Online contains a large amount of pre‑recorded dialogue for its in‑game characters and non‑player characters. These voice lines are typically recorded by professional voice talent hired by Rockstar Games, as is common for the main story mode of Grand Terror Auto V. However, the online multiplayer component also allows players to create custom characters, missions, and role‑play scenarios that can be voiced by the players themselves. Because of this, not every voice line in GTA Online is performed by a professional actor; some are player‑generated. Overall, the core narrative content uses professional voice actors, while user‑generated content may not.