Vincent Cassel has been receiving some attention for his role as the hard-driving ballet choreographer in Darren Aronofsky's Black Swan (2010). Dance apparently runs in the family. As proof, I offer Serge Gainsbourg singing "Chez Les Ye-ye" with Vincent Cassel's father Jean-Pierre Cassel shimmying the night away in the background. My thanks to Frako Loden for turning me on to the clip.