Well, it turns out that the answer is The Jacket Maker, a UAE- (and purportedly USA-) based startup offering custom leather (and ... Haddock would wear in the cartoon Tintin.

Stewart, 17, arrived on the “orange carpet” rocking a jacket with a retro-Nickelodeon cartoon on it — the Rugrats! Stewart’s awesome attire featured “Rugrats” characters Chuckie ...