Do special missions in gta online include voice acting?

The only verified source provided discusses Grand Theft Auto IV and its single‑player mode, with no mention of voice acting in any of its missions. The question specifically asks about special missions in GTA Online, a separate game mode that is not covered by the supplied evidence. Because the evidence does not reference GTA Online or its use of voice actors, we cannot confirm the presence or absence of voice acting in those missions. For an accurate answer, additional sources that directly address GTA Online’s audio design would be required. Until such information is available, the safest response is that we have no evidence to support the inclusion of voice acting in GTA Online special missions.