Alexa PenaVega — Jo Harding as a Child — Alexa PenaVega — Jo Harding as a Child

Credited as Alexa Vega, PenaVega plays young Jo in the prologue, establishing the loss that shapes the adult character's pursuit.

She later became widely known for the Spy Kids films and continued acting in film and television. The brief performance carries unusual structural weight because it defines the story's emotional weather.