Millennials, beware -- you think it's a-ok to walk around sans sunscreen without a care in the world now, but soon, very soon, you'll be ruing the day. A new study from RealSelf reveals that more than 70 percent of millennial women still don't regularly wear sunscreen and are generally unconcerned about aging.

Despite the fact that skin cancer is the most common form of cancer in the U.S., women aged 18 to 44 are still woefully in denial about SPF. Of those surveyed, 77 percent of women 18 to 24 said they never wear sunscreen or "only wear it at the beach," and only 10 percent reported wearing it every day or 5 or 6 days a week. Their older counterparts in the 25 to 34 age range were slightly better off: 27 percent reported that they wore sunscreen every day or 5 to 6 days a week.

RELATED: 12 Best Sunscreens -- and the 4 Worst

Millennials who protected their skin were also more likely to want to modify their bodies. But, at the same time, millennials claimed to be unconcerned with aging. When asked about whether they purchased products with anti-aging benefits, around 88 percent of respondents 18 to 24 said no, while 20 percent of those in the 24-44 age group said yes. When asked if they felt pressure to look younger, 85 percent of those in the 18-24 age group said no, while 20 percent of those in the older age groups said yes.

Obviously, aren't going to worry too much about looking old -- they're still so young! But perhaps they should start solving skincare problems before they start? Or maybe they all think they're special flowers who'll never suffer from wrinkles or bad skin. Probably that.