Dom, you have a great eye!
The legendary Delphine Seyrig also appears, in a scene set in a cemetery with a mock funeral supposedly staging "the death of fashion." Unfortunately Grayson for some reason was not included in that scene, even though one can imagine how perfect it would have been to have had her declaiming some iconic phrases over the ultra chic "corpse."
As many of us know, Delphine went on to appear in the Belgian horror film Daughters of Darkness opposite our very own John Karlen in 1970.
Delphine and Grayson probably did know one another--Delphine spent time in the Fifties and Sixties living in Greenwich Village doing avant garde theatre and hanging out with the Beats (and appearing in the early Beat film from 1958, Pull my daisy).
G.