Apparently, muses tend to run in the family around the fashion industry. Take, for instance, Matthew Williamson and his inspirational mother.

For vegetarian designer Stella McCartney, it’s her four year-old son Miller!

“My eldest son is just starting to have a mind of his own. I was going to do pirates and he said: ‘Nah, don’t do pirates.’ It suddenly dawned on me that this wasn’t just about what parents want to put on their kids, but about what kids will choose themselves. I needed to make every piece [of clothing] one that my children wanted to wear.”

Who knows—perhaps we’ll be seeing Miller creating ranges in the future. Those McCartneys are an imaginative group, after all.

The 70-piece collection, which is priced from $14 to $128, hits select Gap stores on November 2nd.