First lady Michelle Obama in an interview on the “Tonight Show” joked that young people were “knuckleheads” who often had unexpected accidents and needed Obamacare.

“A lot of young people think they're invincible, but the truth is that young people are knuckleheads,” Obama told new host Jimmy Fallon on the late night show.

‘They’re the ones who are cooking for the first time and slice their finger open, they’re dancing on the bar stools,’ she continued to laughter. “But while young people think they’re invincible, they’re not.”

The first lady has taken a prominent role in the administration’s push for more young people to sign up for Obamacare’s insurance exchanges. But the administration is still behind their targets.

Young, healthier consumers are needed to enroll to keep the health law afloat and balance the larger numbers of older, sicker patients expected to sign up.

President Obama on Thursday also said that Obamacare enrollments were “close to 4 million” suggesting a continued surge in sign-ups, but leaving the administration still short of their 7 million target by the end of March 31.

The first lady’s comments came during a light interview with the new host of the iconic late night TV show.

Michelle Obama also joked about her daughters starting to drive, warning that Washington drivers “need to watch out” with another Obama on the road.

The first lady also said she was watching the Olympics “every single night,” naming figure skating and skiing as two of her favorite events.