500 essential Oscar photos (plus trivia!) to get you ready for the Academy Awards

Browse more than 500 photos illustrating every part of Oscar night, from the red carpet's all-time best and worst dresses to gift-bag goodies.

The 91st annual Academy Awards are happening Sunday. Are you ready?

To help you prep, we've compiled this cheat sheet of Oscar trivia, fashion photos, nominations info and other essential tidbits that will help make you an informed viewer of the host-less soiree that is going to show all 24 Oscar categories live, after all. That's in the wake of scrapped plans to award a "most popular" Oscar and a short-lived decision to present four categories during commercial breaks.

Below, browse more than 500 photos illustrating every aspect of Oscars night, from actors who have been nominated and never won to the red carpet's all-time best and worst dresses to the iconic movies that were snubbed by the awards.

Could you name them all? All 90 best pictures

Brush up on your best picture trivia with all the category's winners, from "Wings" to "The Shape of Water."

The faces to watch in the night's key categories

Get acquainted with the Hollywood stars nominated for the night's biggest awards.

Looking back: History's best Oscar dresses

The Oscars red carpet is as much a spectacle as the actual awards. Here, take a trip down memory lane with iconic Oscar looks from years past with these two galleries.

The worst Oscar dresses of all time

Not every Oscars look is a success. From Bjork's infamous swan dress to Cher's nude getup, revisit the shocking Oscars looks that made history for the wrong reasons.

And here's what they wear under it all

Silicone, strapless and smoothers are a star's best friend on the red carpet.

What’s in that gift bag for Oscar nominees?

From international trips to cannabis edibles, big-name nominees get more than $100K worth of giveaways.

A winner at any age

From Tatum O'Neal to Christopher Plummer, see which Hollywood stars made history with their early and late-in-life Oscar wins.

The most memorable political speeches

Will politics be a topic at the podium this year? It has been in the past.

How is it even possible these movies didn't win?

From "Psycho" to "Gangs of New York," many of history's acclaimed films got completely shut out at the Academy Awards.

And these actors haven't won either

No Bradley Cooper? No Johnny Depp. They're both empty-handed.

But these actors? They've won their share

Though nearly no one has more than two.

See photos from the Oscar nominees’ luncheon

Every year, Oscar contenders gather before the ceremony to celebrate their nominations and practice their red carpet smiles.

And all the other pre-parties

Hollywood has been warming up for the big night all week.

What won't be captured by the Oscar cameras

From the expensive bar to the seat fillers, take a peek behind the scenes of the Oscars telecast.

All the best photos from the 2018 Academy Awards

Relive all the drama of last year's awards from backstage.

By the way: Who is 'Oscar'?

Here's a look at why the Academy Awards go by that name, and a few other fun facts.

Contributing: Maeve McDermott

This article originally appeared on USA TODAY: 500 essential Oscar photos (plus trivia!) to get you ready for the Academy Awards