According to a new study feelings of free-spirited childishness last well into our early twenties preventing the average Brit from feeling like an adult until they hit 29.
The research shows that money worries created by student debt and the cost of getting on the property ladder force twenty-somethings to delay the key milestones that define an adult life.
The report from insurance firm RIAS also showed that 'achieving financial independence' is the key marker for most Brits, but the average person won't achieve this until they hit 38.
Others say the big marker of adulthood is having children, although financial restrictions are causing people to delay getting pregnant until they can buy a home or find their spot on the career ladder.
In Britain today three million 20 to 34-year-olds are living with their parents - a rise of 20% since 1997.
What do you think of this study? Do you agree?
GWYNETH PALTROW TALKS SEX ADDICTION
MIC'S SPENCER MATTHEWS LAUNCHES TELL-ALL AUTOBIOGRAPHY
JOSEPH GORDON-LEVITT HAS LONG TERM SECRET GIRLFRIEND
NINA DOBREV DATING CHERYL COLE'S EX DEREK HOUGH?