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 said yesterday.
Miller hinted at GQ Men Of The Year black carpet last week, saying, “I have been shooting in Queensland on a feature film.”