The comedian, who has served as the host of the Golden Globes in recent years, hit out at organisers of the awards with a scathing remark on Twitter.
He posted: “Why did the Oscars announce all the white nominees first?”
The Academy did not named a single actor of any other race in the Best Lead Actor, Best Lead Actress, Best Supporting Actor and Best Supporting Actress categories, when the nominations were announced on Thursday (15 January), marking the second year in a row that this was the case.
And judging by the responses to Ricky’s tweet, the lack of diversity hadn’t gone unnoticed by the public either.
This year will see Bryan Cranston, Matt Damon, Leonardo DiCaprio, Michael Fassbender and Eddie Redmayne battling it out for Best Actor, while Cate Blanchett, Brie Larson, Jennifer Lawrence, Charlotte Rampling and Saoirse Ronan will go up against each other for Best Actress.
The Best Supporting Actor category features Christian Bale, Tom Hardy, Mark Ruffalo, Mark Rylance and Sylvester Stallone, while the Best Supporting Actress nominations are made up of Jennifer Jason Leigh, Rooney Mara, Rachel McAdams, Alicia Vikander and Kate Winslet.
This year's Oscars ceremony will take place on 28 February 2016 at the Dolby Theatre in Hollywood.
See the full list of nominations here.