In the order they appear in the movie are:
Art Mylott, behind "Little Jackie" dancing on the picnic table and swinging her around,
Dorothy Wills Mylott holding Little Jackie and later playing tennis,
Unidentified older couple, formerly thought to be Yettos
Baby W and his mother Claire holding him with "Little Jackie" on the side
Emile Rivet hugging Malvina Hamel his wife,
Walker Yetto lighting a cigarette,
Then there's a toast to the cameraman and for a brief moment at the very end, Al Rivet appears wearing blue pants.