How long have Jacy and Kacy been alive?
The sisters possess a span of existence which is a mystery. The years they have walked upon this earth remains hidden from public knowledge. Nobody knows the exact age that Jacy and Kacy. They prefer keeping their age to themselves. One cannot find any concrete evidence about the number of years they have lived. It's a part of their enigma.
Mixed Up Slime Challenge ~ Jacy and Kacy YouTube