Does this mean grey hair is officially a thing?

Images: Getty / Instagram.

Grey hair has been threatening to become a thing for years, and the trend can now count BadGalRiRi among their devotees.

Rihanna road-tested a long grey ponytail overnight at the Diamond Ball charity gala, joining the newest member of the grey-haired gang, Zosia Mamet.

The only thing that possibly tops RiRi’s epic ponytail is her take on Pantone’s Colour of the Year for 2015, Marsala, in a stunning Zac Posen gown.

Stop what you're doing: Kate Middleton finally changed her hair.

While we wait for confirmation on her exact lipstick shade, Urban Decay’s Revolution lipstick in Shame is an excellent dupe.

Check out the other celebrity hair looks we're obsessed with right now: