Participants will be excluded from the study if they meet any of the following criteria:

1. Are pregnant or breastfeeding.

2. Have a clinical diagnosis or history of dyskinesia due to condition other than CP.

3. Have inability to swallow soft foods, unless medications can be administered via gastrostomy/gastrojejunostomy tube.

4. Have any suicidal behavior or suicidal ideation in the year prior to screening or on Day 1.

5. Is a substance abuser of any compound.

6. Known history of long QT syndrome or cardiac tachyarrhythmia, or clinically significant electrocardiogram (ECG) abnormalities.

Study to Assess the Efficacy, Safety, and Tolerability of Valbenazine for the Treatment of Dyskinesia Due to Cerebral Palsy