Mel Johnson, on 09 January 2011 - 01:47 PM, said:
If Balanchine were involved at all, it was more in the nature of editor. Villella did the choreography, and had a rehearsal or two with Balanchine, who did a "Uh-huh, that's good, fix that, less here, more there" kind of supervision. It wasn't echt Balanchine by a long shot. I remember attending a performance by Villella and his company, and the work was on there, but credit was entirely to Villella.
The Balanchine catalogue online at balanchine.org says this about Diana and Actaeon:
363. DIANA AND ACTAEON PAS DE DEUX
Made for Television
Music: By Cesare Pugni [? ]
Choreography: By George Balanchine after Petipa (Le Roi Candaule)
Cast: Patricia McBride, Edward Villella.
First Telecast: June 2, 1968, Ed Sullivan Show, CBS.
Note: Petipa's dance, inserted into Le Roi Candaule sometime after its premiere in 1868, was a pas de trois, which Balanchine may have performed (see ROLES PERFORMED BY BALANCHINE, Love of Diana, 1922). In 1935, Agrippina Vaganova reworked Diana and Actaeon as a pas de deux, and in this form it has been frequently danced by Soviet and Russian dancers ever since. Balanchine may well have been familiar with both versions.