According to new research, your teenage years might last a tad longer than anticipated - in fact, scientists at the University of Pittsburgh argue that they could last until you hit 25. Twenty-five.
The research revealed that our brains are transitioning as fast from child to adult because we're now more likely to put off career and relationship goals until later in life.
So we're asking you for this week's poll - when did you grow up? Answers below please...