Angela Bassett introduced the segment, which was already being slammed for its fast pace, noting they were celebrating "the artists who gave us permission to dream, the technical pioneers and innovators who expanded our experience of movie love".
Naya may have been best known as Santana Lopez in Glee, but she also featured in film roles including Mad Families and At The Devil's Door. She died on July 8, 2020 at Lake Piru, California at the age of 33.
The actress, who was an incredible singer and had been nominated for two Grammys, was also left out of the Grammy's In Memoriam segment as well.
Jessica, who is famous for her role as Lucille Bluth in Arrested Development, also starred in a number of film roles including Play Misty for Me, Grand Prix and Spring Fever and passed away at the age of 80 on March 24.
Songwriter Adam Schlesinger was also notably absent after passing away on April 1, 2020 at the age of 52, he had been nominated for an Oscar for writing the title track of the Tom Hanks film That Thing You Do!.
Jessica and Adam both appear online in the Academy's In Memoriam photo gallery, but Naya does not.
Fans took to social media to share their disappointment with many also noting the speed at which the slideshow was shown and the 'upbeat' song that was played.
"The ‘In Memoriam’ part of the Oscars last night was so insanely disrespectful," One wrote. "No one deserves to have their name on a screen for less than the time it takes to read it. Also, I cannot BELIEVE they left out Naya Rivera and Jessica Walter."
"Naya Rivera was left out of the In Memoriam by the @TheAcademy now too," another added. "Naya deserves better, and we will remember her forever."
"Once again, no love for Naya Rivera," someone else wrote.
"I was fully expecting to see Naya Rivera’s name in this segment," another fan wrote. "Was I the only one?"
"The Oscars not acknowledging Naya Rivera or Jessica Walter is a slap in the face," one added.
"Adam Schlesinger was nominated for an Oscar for writing 'That Thing You Do!' in 1997," actress and Crazy Ex-Girlfriend creator Rachel Bloom wrote. "I don't know why he wasn't in the official In Memoriam segment tonight (especially because he wrote one of the greatest film songs of all time) so I'm honoring him here."
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