#GregJames, #JADE and a sea of celebs turned out for the Blue Planet III premiere. #BluePlanet3, coming soon to iPlayer. Watch The Blue Planet and Blue Planet II on iPlayer now. Sir David Attenborough returns 25 years after the original series transformed audiences’ understanding of life beneath the waves. He takes us deeper into our oceans than ever before, revealing extraordinary new stories - filmed using cutting-edge technology. #DavidAttenborough