Today is World Mental Health Day, and one famous daughter is using the occasion to spread awareness and honor her father, Robin Williams.

Zelda Williams took to Twitter Friday to give her thoughts on the subject of mental illness.

Williams tweeted, "Today is #WorldMentalHealthDay. Mental illness is often misunderstood & misrepresented, but that's starting to change. Let's end the stigma." She then went on to post a series of follow-up tweets. In these, she urged people to support those who need help and to reach out if they need it as well.