* The commercial featured a "gangsta" aesthetic. This suggests the actors were likely chosen to portray that particular image and might have been known for roles in similar projects.
* The era was the early 1990s. This era was the height of the "gangsta" rap movement, so the actors could have been up-and-coming hip hop artists or performers associated with that culture.
* The commercial was for Oreo cookies. This implies the actors were chosen for their ability to appeal to a younger audience.
Unfortunately, without a specific record or behind-the-scenes information from Nabisco (the Oreo producer) or the commercial's production company, it's impossible to definitively name the actors and actresses.
If you find the ad itself, perhaps you can recognize the faces or find information about the actors within the credits.