On Sunday, the world finally got to see which stars bagged a coveted Oscar and boy, was it a jam-packed evening.

But it seems there was one element of the ceremony that stirred up controversy amongst viewers - the 'In Memoriam' segment, which visibly left out Luke Perry and Cameron Boyce from the tributes. Now, The Academy has explained why.

Keep scrolling to find out the reason behind the controversial move.

It's that time of year again...

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Awards season is in full swing and on Sunday it was turn of the hotly anticipated Oscars.

The Oscars are one of the biggest events in Hollywood...

And the biggest names in the industry hit the red carpet on Sunday to see who will be honored with an award this year.

For the second year in a row, the annual event is hostless...

Last year, people were pretty uncertain about how the evening would pan out but it seems it's a tradition the Academy is set to continue. ABC Entertainment President Karey Burke made the announcement last week while speaking at the Television Critics Association's winter press tour in Pasadena: "Let me confirm it now, together with the Academy, that there will be no traditional host this year."

Across all the major categories, there's been some tough competition.

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Especially when it came to the 9 flicks that went head to head in the "Best Picture" category.

People have been extremely excited since the nominations were announced...

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Especially given the fact that so many critically-acclaimed movies have hit screens recently.

But of course, it's not only about the movies.

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The Oscars is a prime time for fans to see their favorites actors and actresses showcase just what they're made of. From outfits to speeches, the award ceremony has become a night to make a statement.

However, the Oscars has given us some other unforgettable moments...

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From celebrity slip-ups to record-breaking selfies, we're expecting to see a whole array of new and exciting moments that will leave their own print in award history.

And who could forget Ellen DeGeneres' iconic selfie?

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It only seems fitting that in this modern era, selfies themselves are breaking records.

Here it is...

I mean, when you combine Brad Pitt, Meryl Streep, Jennifer Lawrence, Bradley Cooper, Jared Leto, and Angelina Jolie in one picture, you're bound to get an overwhelming reaction, right? Well, thirty-seven million people on Twitter wanted to catch a glimpse of it and yeah, it crashed the platform.

But the award ceremony has also been criticized...

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Celebrities have used the stage to share experiences, awareness and give speeches that have sent ripples throughout the film industry. However, the Oscars also give tribute to beloved actors and actresses that we've lost throughout the year.

Joaquin imparticular mentioned his late brother, River Phoenix.

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"When he was seventeen, my brother wrote this lyric and he said 'run to the rescue with love and peace and the rest will follow. Thank you," he concluded.

Fans all around the world were left speechless...

And a surge of love and admiration has certainly gone in Joaquin's way.

Watch his full speech here...

Joaquin wasn't the only one to give a tribute at the Oscars.

There were some people that weren't mentioned...

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The 'In Memoriam' section seemed to leave out a pair of pretty incredible individuals.

The ceremony seemed to spark some controversy.

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The Oscars forgot to mention Luke Perry and Cameron Boyce in the tributes to talents lost in the past year.

Those that were mentioned were...

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Kobe Bryant, Rip Torn, Barbara Hammer, Steve Golin, Diahann Carroll, Agnes Varda, Seymour Cassel, Doris Day, and Kirk Douglas.

Luke Perry died last year at the age of fifty-two after suffering a "massive stroke."

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The actor, who was well known to younger audiences for starring in Riverdale, also worked on several high-profile films. His most recent and final role starring alongside Leonardo DiCaprio in Once Upon A Time In Hollywood.

Perry's fans took to social media to express their outrage.

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They described the Oscars' decision to not include the actor in their tribute as "Bullsh*t."

These were some of the responses...

One of Perry's fans said: "Luke Perry wasn’t in the In Memorial?? He was literally in one of the most nominated films of the night!! Disrespectful!!’ Another said: ‘How the f*k is Luke Perry not in the In Memorium segment?" Many people agreed. One wrote: "Wait a minute? Let me see if I’m understanding this…the Oscars had a Memoriam and somehow Luke Perry was excluded despite that he’s in one of the nominated films?!"

Cameron Boyce was also absent from the Oscars tributes.

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Cameron died last July after suffering an epileptic seizure at just twenty years old.

Boyce was famous for his work on Disney’s The Descendants and its sequels.

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He also worked alongside Adam Sandler in the Grown Ups films.

Boyce's co-stars were understandably upset.

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Skai Jackson who worked with Boyce on the Disney show, Jessie, expressed her disappointment on Twitter, saying: "Cameron Boyce??? Why did you guys forget about him? It would have been nice if he was acknowledged… Smh."

Following the outrage, The Academy has broken its silence.

And they've revealed the reason why Luke Perry and Cameron Boyce were not featured in the segment.

In a statement published by The Hollywood Reporter, The Academy finally offered an explanation.

And it seems it was down to nothing but time constraints... "The Academy receives hundreds of requests to include loved ones and industry colleagues in the Oscars In Memoriam segment. An executive committee representing every branch considers the list and makes selections for the telecast based on limited available time."

Although they said they pair have still been honored on the website.

"All the submissions are included on Oscar.com and will remain on the site throughout the year. Luke Perry and Cameron Boyce are remembered in the Oscar.com gallery." the statement concluded.

Watch the full In Memoriam clip below:

Want to read more about the Oscars? Keep scrolling to check out Natalie Portman's dress which sported a "secret message."