1 of 8
Reformation Fall guest

In the Navy

A rich, inky blue is the ideal alternative to basic black — it looks great on every skin tone (and feels a little less serious). Up your wedding-guest game with a retro-inspired navy dress that shows off your shape and boasts special details like tie straps and a ruffle hem. Shop This Look: Reformation Nikita Floral Dress, $248; nordstrom.com

2 of 8
tadashi fall guest

Lace Up

Can't stay away from classic black? We don't blame you. Opt for a dark frock in a  novelty fabric to add texture and tone to your look. This lace dress feels romantic, sultry, and ladylike all at once: a total wedding guest win! Shop This Look: Tadashi Shoji Lace High-Neck Pleated A-Line Cocktail Dress, $378; neimanmarcus.com

3 of 8
Aidan mattox fall guest

Velvet Love

If you're stuck on what to wear to a formal wedding,  try channeling your inner screen siren in a delicious berry-hue velvet gown. The fabric feels luxe and glamorous, and the asymmetric ruching and draped ruffle trim are ultra flattering. Va-va-voom!  Shop This Look: Aidan Mattox Strapless Velvet Gown, $295; bloomingdales.com

4 of 8
Keepsake fall guest

You’re Blushing

Darker hues aren't required just because it's fall; you can absolutely opt for softer colors with your fall wedding guest dress pick. We love how this one-shoulder dress combines a delicate shade of pink with a dramatic silhouette. Pro tip: Try accessorizing this blush beauty with burgundy extras — the color combo is unexpected and perfect for the transitional season. Shop This Look: Keepsake Hold Back Long Sleeve One Shoulder Maxi Dress, $301; asos.com

5 of 8
Cooper st fall guest

Golden Girl

Remember what we said about darker colors not being required? Mustard, marigold, and golden yellow hues are a major autumn trend — and will be continuing into spring. That means you can wear this standout lace number for a fall outdoor wedding now (just picture it against a foliage backdrop!) and then stun all over again next season in front of a whole new crowd (as long as the guest lists don't overlap). Shop This Look: Cooper St Garland Frill Lace Midi Dress, $200; nordstrom.com

6 of 8
BB Dakota fall guest

Garden Variety

Go for a boho-meets-boudoir look with floral embroidery and lace trim. A hint of sheer detail, ultra-thin spaghetti straps, and lingerie-inspired edges add some sexiness to the sweet flowery embellishment — a perfect combo for a rustic fall evening wedding. Shop This Look: BB Dakota Let's Dance Dress, $120; shopbop.com

7 of 8
Truly fall guest

Lady in Red

A red dress for a wedding guest? Absolutely! Just be sure to keep your look streamlined and sophisticated — avoid ultra bright reds and overly embellished styles. If you're headed to a black-tie affair, this glam gown hits all the right notes — and lets you show off a killer pair of heels. Shop This Look: Truly Zac Posen Strapless Mikado High-Low Ball Gown, $200; davidsbridal.com

8 of 8
Gal meets glam fall guest

Crown Jewel

Jewel tones are everywhere this fall and this fuchsia midi dress hits the must-have trend in an elegant way. For a daytime wedding, pair it with neutral pumps, stud earrings, and a top handle mini bag. For an evening wedding, try it with sparkly statement earrings, a metallic clutch, and strappy sandals. Shop This Look: Gal Meets Glam Collection Diane Mock Neck Fit & Flare Midi Dress, $168; nordstrom.com