The biggest award show of the year has arrived and, as usual, all eyes were on the star-studded red carpet. Click through our gallery above to what all the celebs wore to the 91st Academy Awards.

The stars emerged on the red carpet wearing their finest tuxes, gowns, and tux-gowns - here's looking at you, Billy Porter. In short, they looked tremendous. 

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The presenters
The 2019 Oscars have been making headlines long before last night's ceremony as producers struggled to find a host after Kevin Hart stepped down from the role amid controversy over old tweets.

In the end, their solution was to appoint a number of high-profile celebrities to fill various roles throughout the event. 

Fortunately, these appointed stars took their roles seriously. Not only did they deliver their lines on cue but they looked fabulous while doing it. The show's hosts were some of the best dressed on the night.

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The Nominees
This year's nominees were truly an outstanding bunch of actors. From Mahershala Ali in Green Book and Olivia Coleman in Irish-produced film The Favourite to Rami Malek in Bohemian Rhapsody and Glenn Close in The Wife - these performances had 'Oscar nomination' written all over them from the moment they hit the silver screen.

Of course, no film got more attention than Bradley Cooper's A Star is Born which earned a total of eight nominations, including Best Picture, Lead Actor for Bradley Cooper, Lead Actress for Lady Gaga, Best Supporting Actor for Sam Elliot, Best Adapted Screenplay, Best Sound Mixing, Best Cinematography, and Best Original Song for Shallow.

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Red Carpet Trends
The Oscars are the perfect way to wave off awards season and the red carpet is always a feast for the eyes as celebrities dare to be different.

The designs are haute couture, the stylists are the best in the business, the stars have some of the most beautiful faces in the world so, of course, competition is at an all-time high to be noteworthy in a sea of extraordinary.

Despite this, certain trends will inevitably emerge and while the BAFTA's saw a splash of jewel tones, the hottest trend at the Oscar was similar to that of the 2019 Grammy Awards which saw celebs looking pretty in pink.

Click through our gallery to see Hollywood's brightest stars arrive at the Dolby Theatre in Los Angeles for an unforgettable evening at the 91st Academy Awards.

Watch the 2019 Oscars on RTÉ2, tonight at 9:30pm.