According to the site, the production is looking for a “2 or 3 year old boy to play 2 year old, Caucasian with RED HAIR, an adorable toddler with an engaging personality, on set experience preferred. IDENTICAL TWINS ONLY.”
We don’t want to jump to any conclusions, but the “Red Hair” mentioned is certainly interesting. Stay tuned for whether this will be significant at all.
The fourth installment is targeted for a May 5, 2011 release.