Actor Joaquin Phoenix felt "a little embarrassed" by his diva behaviour on the sets of "Joker". The video showed an annoyed Phoenix sniping at the film's cinematographer Lawrence Sher.

Clad in his Joker get-up (green hair, clown make-up), Phoenix is seen telling Sher to stop distracting him. "The constant whispering," he said in the clip. "Just shut the f**k up, dude. I'm trying to find something real." In response, Sher calls him Cher, poking fun at his diva-like behaviour, reports eonline.com.