Joseph Sissens' long, long legs are the first thing you notice. The 23-year-old from Cambridge, England, is a dancer of lean elegance, expansive lines and beautiful footwork. Choreographers at The Royal Ballet make a beeline for him. Wayne McGregor—a man with an astute eye for talented dancers in the corps—cast him in Obsidian Tear and Yugen. Twyla Tharp chose him for The Illustrated 'Farewell'. And the first artist's appearance in new work by contemporary choreographer Alexander Whitley and a slinking, grooving solo, jojo, by up-and-comer Charlotte Edmonds suggests a dancer with a curious mind, as well as a protean facility for whatever physical demands are thrown his way.