Image copyright AFP/Getty Images Image caption British actor Idris Elba was one of the big winners on the night

The journalism drama Spotlight took home the main prize at the Screen Actors Guild awards, but the success of minority actors drew most attention.

The film, about the Boston Globe's investigation of paedophile Catholic priests, won for best film cast.

But many of the main awards in Los Angeles were won by actors of diverse backgrounds, with industry magazine Variety noting that "diversity reigns".

It comes amid controversy over a lack of diversity among Oscar nominees.

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British actor Idris Elba won for his roles in the detective drama Luther, and for his supporting role as an African warlord in Beasts of No Nation.

"Ladies and gentlemen, welcome to diverse TV," he said as he presented an award.

Media playback is unsupported on your device Media caption The Los Angeles ceremony presented an alternative to the all-white list of Oscar acting nominees, as Peter Bowes reports

The female prison series Orange is the New Black won the ensemble award for a comedy series, and its star Uzo Aduba for best comedy actress in a television series.

The series has earned praise for its diverse cast and willingness to address race issues. Accepting the cast award, actress Laura Prepon referred to her cast mates, saying: "This is what we talk about when we talk about diversity."

The three main acting awards were given to films with mainly white casts, Spotlight, The Revenant and Room, all of which are among the Oscar favourites.

Image copyright Getty Images Image caption Leonardo DiCaprio and Brie Larson won the main acting awards

Image copyright Open Road Films Image caption Spotlight is among the favourites for the Oscars in February

The absence of any non-whites in the four Oscar acting categories for the second year running has prompted discussion on diversity in Hollywood.

Since then, the organisation behind the awards has promised to double the number of female and minority members, a move welcomed by leading actors.

However, director Spike Lee, actress Jada Pinkett Smith and her husband Will Smith announced they would not be attending next month's awards.

The other main winners of the SAG awards include:

Brie Larson (Room) - Best film actress

(Room) - Best film actress Leonardo DiCaprio (The Revenant) - Best film actor

(The Revenant) - Best film actor Queen Latifah (Bessie) - Outstanding performance by an actress in a TV miniseries or movie

(Bessie) - Outstanding performance by an actress in a TV miniseries or movie Kevin Spacey (House of Cards) - Best actor in a television drama series

(House of Cards) - Best actor in a television drama series Viola Davis (How to Get Away With Murder) - Best actress in a television drama series

(How to Get Away With Murder) - Best actress in a television drama series Downton Abbey - Best television drama ensemble

The full list of winners can be found here.