Australian author and illustrator Terry Denton has died at the age of 76, leaving behind a remarkable creative legacy that brought humor, imagination and laughter to generations of children in Australia and around the world.

Denton, best known for his work on the hugely popular Treehouse books with writer Andy Griffiths, died on Monday, September 21, 2026, surrounded by his family, according to his literary agency Curtis Brown and publisher Pan Macmillan.

His death marks the passing of an influential figure in Australian children’s literature whose distinctive drawings became instantly recognizable to millions of young readers.

A Career Built Around Books and Imagination

Terry Denton created and illustrated more than 30 books during his long career.

Among his notable work was the Gasp! series, which was later adapted for television. He also illustrated books by several prominent Australian children’s authors, including Mem Fox, Paul Jennings and Gillian Rubinstein.

Denton’s work was characterized by playful drawings, unusual characters and an energetic visual style that complemented the humor and storytelling of the books he worked on.

His Remarkable Partnership With Andy Griffiths

One of the defining chapters of Denton’s career was his decades-long creative partnership with Andy Griffiths.

The pair worked together for more than three decades, with Denton providing the illustrations for the internationally successful Treehouse series. The series began with The 13-Storey Treehouse, which went on to sell more than 10 million copies worldwide.

Their collaboration became particularly popular among young readers because of the combination of Griffiths’ humorous writing and Denton’s imaginative illustrations.

Together, they created a distinctive world filled with absurd inventions, eccentric characters and visual jokes that became a major part of the reading experience.

Family Remembers Terry Denton

Following his death, Denton’s family remembered the happiness his creative work brought to children around the world.

His family said his stories and illustrations gave joy to millions of children while emphasizing that, despite the enormous audience for his work, he always returned home to his family.

They expressed gratitude that his books would continue bringing wonder, laughter and comfort to future generations, including his grandchildren.

Denton is survived by his wife, Kristen, his children Max, Imogen and Eve, and five grandchildren.

Andy Griffiths Mourns His Longtime Friend and Collaborator

Andy Griffiths also paid tribute to Denton following news of his death.

Griffiths reflected on the more than three decades they spent working and playing together, describing the partnership as an extraordinary period of creativity and laughter.

He expressed gratitude for Denton’s contribution to their work and the joy their books brought to children around the world.

For Griffiths and many readers, Denton was more than an illustrator. His drawings became an essential part of the identity of the stories they created together.

What Was Terry Denton’s Cause of Death?

The cause of Terry Denton’s death has not been publicly disclosed.

ABC News reported that Denton had experienced poor health in recent years, but no specific cause of death was announced by his family, literary agency or publisher.

He died surrounded by family on September 21, 2026.

Terry Denton’s Lasting Legacy

For generations of Australian children and readers internationally, Terry Denton’s illustrations became part of their childhood reading experiences.

His creative partnership with Andy Griffiths helped make the Treehouse books a major success, while his own books and collaborations with other writers demonstrated the breadth of his talent.

Beyond the books themselves, Denton will be remembered for the humor, creativity and imagination that defined his work.

At 76, Terry Denton leaves behind a body of work that will continue to introduce new generations of children to his distinctive drawings and imaginative worlds. His stories, illustrations and creative partnerships have secured a lasting place in Australian children’s literature.