Co-director Eric Guillon admits it was a challenge to create a haircut on a head that doesn't have a forehead. "I came up with the idea of a part in the middle and longish hair – a bit cheesy but it gives Dru a teenage look."
The look of Minion Mel, who leads the revolt against Gru, is actually inspired by Chris Meledandri, the founder of Illumination, the studio behind the Despicable Me franchise
"I designed a birthday card for Chris a few years ago," explains Guillon. "I drew Chris as a Minion and used the same design and haircut for Mel that I used on the card."