The Daily Telegraph report that the 35-year-old is playing Mami - Diego’s mum, Dora’s aunt and sister to Longoria's character - Dora's mum Elena.
The flick has already wrapped up filming on the Gold Coast.
“(I) can confirm Pia Miller as Diego’s mother in the film. Diego was played by Jeffrey Wahlberg,” a production spokesman shared.
Other Aussies starring in the film include Madeleine Madden, Nicholas Coombe and Matt Okine.
Nickelodeon's Dora the Explorer will be released later this year.