This movie is very cute. It's great to see all of the Mowry children in one movie together. The story is about the son Willie (played by Taj Mowry) who is a scientist. He is trying to create a youth formula. By accident his grandparents become exposed to this and turn "seventeen again". This also causes them to begin to reminisce and realize that they still have feelings for each other. This leads to a lot of mayhem considering that now Sydney (Tia Mowry) has a twin. (With her being new in town nobody really knows the difference.) Will the grandparents get back to their true ages? You'll have to watch the movie, but its well worth it.