Serge Lifar photographed by Cecil Beaton, 1930.
By the way, I know that Beaton (my favorite photographer) met Serge Diaghilev. There is a memoir about their meeting by Cecil himself in the book devoted to Diaghilev. But. I never saw a photo made by Beaton. I think he wouldn’t miss an opportunity to do that (Diaghilev was a world-famous celebrity and Cecil wanted to get fame in that time). Maybe somebody found it in some old albums?