Benny's actress Belita Moreno. During an interview with George about the show he was asked which actor is the least like their character, He said that unlike Benny, Belita is a very nice person.
Carmen's actress Masiela Lusha is an accomplished humanitarian and author, who graduated high school at 15. A far cry from the emotional Jerkass and "anonymous C student" she portrays, though she did quit the show over creative differences.
The Other Darrin: Mrs. Cardenas, in her first appearance, is played by actress Lilian Hurst. Afterwards she is played by a different actress, likely in a fat suit to make her appear morbidly obese and voiced by a man.
Producers: Sandra Bullock is a co-executive producer of the show; she's good friends with Lopez and helped get his show off the ground, then eventually had a guest-starring turn as Accident Amy.