I'm 35 and my wife is 30. I was born in 1980 which means some people would say gen-x and some would say millenial. I'm also the younger child, with my older sister being squarely in gen x.
My wife definitely has more of the typical millenial characteristics then I, and talking of our high-school experiences it almost seems like we were decades apart rather than just 5 years, though perhaps some of that is that we grew up on opposite coasts.