Film director Spike Lee and actress Jada Pinkett Smith have said they will not attend next month's Oscars ceremony because of the mostly white nominees.
Lee said on Instagram he "cannot support" the "lily white" awards show.
Academy President Cheryl Boone Isaacs has praised the "wonderful work" of the nominees but said she was "heartbroken" at the lack of diversity.
This is the second year in a row there have been boycott calls, sparked by a list of nominees that is mostly white.
Among those overlooked were the NWA biopic Straight Outta Compton for best picture and Will Smith for best actor in NFL film Concussion.
His wife, Jada Pinkett Smith, said in a video message on Facebook that she would not attend.
"Begging for acknowledgement, or even asking, diminishes dignity and diminishes power," she said.
"And we are a dignified people and we are powerful."
She and Lee made their announcement on Martin Luther King Jr Day, a national holiday in the US to remember the civil rights leader.
"Forty white actors in two years and no flava at all," said Lee. "We can't act?!"
Lee said on Instagram he "cannot support" the "lily white" awards show.
Academy President Cheryl Boone Isaacs has praised the "wonderful work" of the nominees but said she was "heartbroken" at the lack of diversity.
This is the second year in a row there have been boycott calls, sparked by a list of nominees that is mostly white.
Among those overlooked were the NWA biopic Straight Outta Compton for best picture and Will Smith for best actor in NFL film Concussion.
His wife, Jada Pinkett Smith, said in a video message on Facebook that she would not attend.
"Begging for acknowledgement, or even asking, diminishes dignity and diminishes power," she said.
"And we are a dignified people and we are powerful."
She and Lee made their announcement on Martin Luther King Jr Day, a national holiday in the US to remember the civil rights leader.
"Forty white actors in two years and no flava at all," said Lee. "We can't act?!"