Affectionately referred to as 'the fashion Oscars,' the Met Gala is the biggest event in any A-lister's calendar, so choosing the perfect dress is kind of a big deal - especially if it's your first time on the Costume Institute's hallowed guest list...
In the interests of nostalgia - and who doesn't love a fashion flashback? - we've taken a trip through the archives to remember what some of our favourite stars wore for their first journey up the Met's red carpeted stairs.
See all of your favourite stars' first Met Gala dresses in the gallery below...
Stars' first Met Gala outfits
1 of 33Taylor Swift, 2008
Taylor Swift wore spangled Badgley Mischka for the 'Superheroes: Fashion and Fantasy' event in 2008. We miss you, Fearless-era Taylor...
2 of 33Blake Lively, 2008
Blake Lively wore all American Ralph Lauren to the 2008 Gala, and accessorised with Dan Humphrey (sorry, Penn Badgley...)
3 of 33Beyoncé, 2008
Before Lemonade, before the lift incident and before Sasha Fierce, Beyoncé wore the dress you dreamed of buying for Year 11 prom to the Met. Except that Queen B's gown was Giorgio Armani, and yours definitely wasn't.
4 of 33Kim Kardashian, 2013
It's the dress that launched a thousand memes: Kim Kardashian famously wore a floral gown from Givenchy by Riccardo Tisci for her first Met appearance in 2013.
5 of 33Diana Kruger, 2004
Diane Kruger is a Met Ball veteran - her first appearance was in 2004, when she wore golden Balenciaga and the sort of fancy scarf cover-up that your mum would totally approve of.
6 of 33Emily Blunt, 2007
Hands up who'd forgotten that Emily Blunt and Michael Bublé were the ultimate Noughties power couple? Emily wore Calvin Klein for her first Met Ball in 2007.
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7 of 33Rihanna, 2007
Eight years before she shut down the Met with her infamous Guo Pei gown, Rihanna opted for a white gown by Georges Chakra couture (complete with black fishnet gloves. Only in 2007)
8 of 33Lily Aldridge, 2011
Victoria's Secret's Lily Aldridge made a glamorous Met debut in 2011, wearing this classic champagne coloured gown by Ralph Lauren.
9 of 33Anne Hathaway, 2009
The hair, the frills: Anne Hathaway really went all out for her first Met Gala appearance in 2009, wearing Marc Jacobs.
10 of 33Gisele, 2003
Gisele strikes an appropriate pose for the 'Goddess' themed event in 2003.
11 of 33Kate Moss, 1995
Kate Moss wore Calvin Klein for the 1995 event, and is pictured here with the designer and fellow supermodel Christie Turlington.
12 of 33Rosie Huntington-Whiteley, 2010
Rosie Huntington-Whiteley's relationship with Burberry goes way back: here she is wearing the Brit brand for her first Met Ball appearance in 2010.
13 of 33Victoria Beckham, 2003
2003 marked the peak of Victoria Beckham's WAG era, and her Met Gala dress didn't disappoint. naturally, she accessorised with Dolce and Gabbana.
14 of 33Alexa Chung, 2010
Instead of a princessy gown, Alexa Chung stayed true to her signature style and chose to wear a suit by 3.1 Philip Lim for her first Met Gala in 2010.
15 of 33Cara Delevingne, 2011
Cara Delevingne took Douglas Booth as her date to her first Met Gala in 2011
16 of 33Sienna Miller, 2006
Sienna Miller was the golden girl of the Met in 2006, channeling her Factory Girl on-screen alter ego in this Sixties-style sequinned Burberry shift.
17 of 33Emma Watson, 2010
Emma Watson kept things relatively simple for her first Met Gala in 2010, wearing this white asymmetric gown by Burberry (for whom she'd just starred in her first major fashion campaign).
18 of 33Mary-Kate and Ashley Olsen, 2005
Remember when Mary-Kate and Ashley wore colour and smiled in photos? The Olsen twins were Two of a Kind in boho Chanel for their first ball.
19 of 33Emma Stone, 2011
A blonde Emma Stone wore floral Lanvin to the Met Gala in 2011.
20 of 33Jennifer Lopez, 2004
Jennifer Lopez posed with Dolce and Gabbana at the 2004 Met Ball - blink and this picture could've been taken a few days ago, such is J.Lo's age defying power.
21 of 33Katy Perry, 2009
For the 2009 event, Katy Perry chose an atypically straight-forward gown from Tommy Hilfiger, though she's henceforth played it far less safe for subsequent appearances on the Met steps.
22 of 33Kendall Jenner, 2014
Kendall Jenner wore Topshop to her first Met Gala (we're guessing she didn't pick it up in the Oxford Circus branch the night before, though)
23 of 33Gigi Hadid, 2015
Gigi chose to wear a red Diane Von Furstenberg number for her Met steps debut.
24 of 33Kristen Stewart, 2010
Kristen Stewart chose a dramatic black Chanel style for the Met Gala in 2010.
25 of 33Carey Mulligan, 2010
Carey Mulligan wore lilac Miu Miu and black opaques for her Met in 2010 - presumably because the red carpet can get chilly sometimes...
26 of 33Eva Mendes, 2004
Eva Mendes wore Zac Posen for her first Met Gala in 2004, which took 'Fashion and Furniture' as its theme
27 of 33Jessica Biel and Justin Timberlake, 2009
Jessica Biel wore red Versace back before the dancing lady emoji was a thing in 2009, while Justin Timberlake wore a suit from his own line, William Rast.
28 of 33Claudia Schiffer, 1998
Colour clash pioneer Claudia Schiffer wore pink and lime green for the 50th anniversary of the Gala in 1998.
29 of 33Charlize Theron, 1999
Charlize Theron wore the ultimate '90s party ensemble for the 1999 event.
30 of 33Amal Clooney, 2015
2015 marked Amal Clooney's first Met Gala, but she still managed to steal the show in tiered Galliano. For 2018, she's on co-hosting duties.
31 of 33Jennifer Lawrence, 2013
Jennifer Lawrence has a long-standing relationship with fashion house Dior, so it makes sense that she chose to wear the label for her first Met Gala in 2013
32 of 33Solange Knowles, 2011
Solange wore patterned Dries Van Noten for 2011's Savage Beauty opening.
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33 of 33Jessica Chastain, 2011
Jessica Chastain wore a little black dress by Emilio Pucci for her first Met Gala in 2011.