I’m told: “There were a whole host of celebrities taking part. It was a really mixed bunch. Meryl Streep and Gary Barlow were in the studio, and there was an audience on set. But the big talking point was Kate and Johnny.
Johnny Depp and Kate Moss were confirmed to be joining as well. [Article] Jude Law and Chris Pine are also in!
Also first video from on set. We get a glimpse of Meryl at the very beginning as well.
Courtesy to coconutmilk83