A 16-year-old suffering from a rare disease will still attend her prom, even though her muscles are literally turning to bone, London’s Daily Mail reported.

Louise Wedderburn, a student in the U.K., has fibrodysplasia ossificans progressive, or FOP, which causes its victims to grow a second skeleton. The second skeleton can crush the internal organs.

The disease is so rare that only 600 people in the world have it.

Louise, who cannot move her left arm, is unable to walk for long periods of time. Although she is home-schooled, Louise is going to attend the prom.

"At first I wasn’t going to go, but my friends said I had to," Louise said. "Then I thought about it, and realized just how important it was. I’m looking forward to getting all dressed up."

There is no cure for the disease and the average life expectancy for someone with FOP is 41.

Click here to read more about this story from the Daily Mail.