We all love these adorable TV commercials, but are the families...really families?

They all look alike, but I just want to know they are related somehow. 

It's sort of like when I was younger, I always wanted "The Brady Bunch" family to be all related in real life or the "Eight is Enough" family!  Or better yet "Little House on the Prairie". 

Do you know do commercials use real families or not?  Maybe I don't even want to know the truth.