They grow up so fast! It’s hard to believe that 13 years have passed since Jon & Kate Plus 8 (then later Kate Plus 8) premiered on television. Kate, 45, and Jon Gosselin‘s, 43, 16-year-old sextuplets — Aaden, Alexis, Collin, Hannah, Joel, and Leah — were just three-years-old when the show began, but now they’re officially teenagers.