In the original pilot, C.J. was Curtis and Ella's son. This was later changed to C.J. as Curtis and Ella's nephew and the addition of Calvin as their son.
At 254 episodes, this is the longest-running sitcom starring a predominately African-American cast. It beat The Jeffersons (1975) by one episode.
LaVan Davis and Cassi Davis have they same last name but they have confirmed that they aren't married in real life or related in any way that they know of.
In the season 1 episodes "Paternity and Fraternity (Part 1 & 2) China Anne McClain's real life sister Sierra McClain plays Jasmine, a girl who might be CJ's daughter by one of his old flames from his high school years.
China Anne McClain's character was written out of the 5th season for undisclosed reasons, and was reintroduced in the 6th season. In the 7th season China made frequent appearances due to her work schedule and filming her Disney show A.N.T Farm.