Siena Gagliano
Associate Editor
Siena Gagliano is the associate editor at Cosmopolitan, where she primarily covers beauty, fashion, travel, and lifestyle. Wanna know how to get the best brows of your life? gotchu. What about how to find the best fashion deals of the season, the softest sheets on the market, or exactly how to use retinol without irritating your skin? Check, check, and check. Before joining Cosmopolitan, Siena was a writer at Bustle and several other media outlets. As her 2024 goal, she has vowed to find the best (extra) dirty martini NYC has to offer—and yes, that means ~attempting~ to try every cute cocktail spot in the city (hit her up with some recs, pls). Follow Siena on Instagram for a behind-the-scenes look at that magazine life.
- Topic Specialties
Latest from Siena Gagliano
The Best Keratosis Pilaris Treatments and Products I’ve Tested as a Beauty Editor
I'm not here to B.S. you—if it's on this list, it means it actually worked on my bumps.
The 8 Best Lip Plumpers for Smooth and Full Lips, According to Beauty Editors
Bigger lips without any needles? Yes, please.
Hair-Removal Creams Are Back And, Truly, Better Than Ever—8 Picks Our Editors Tested That Prove It
Sorry, but I'll never go back to waxing.
I’ve Tested Hundreds of Mascaras—These 13 Are the Best, According to Beauty Editors
For longer, fuller lashes—fast.
11 Chic and Cozy Travel Wraps That Make Flying Basic Economy Actually Comfortable
It comes everywhere with me!!
I Asked 5 Skin Experts—These Are the Stretch Mark Creams and Oils That Actually Help
Finally, an answer on if all the creams and oils really work.
These Cream Blushes Are So Subtle and Radiant, No One Will Ever Accuse You of Blush Blindness
4 Cosmo beauty editors break down their favorites.
Ash Brown Is Set to Be the Biggest Spring/Summer Hair Color Trend
Take a walk on the cool-toned side.
The Strengthening Products Experts Recommend If Your Nails Are Brittle, Peeling, and Damaged
Two of these won Cosmo Holy Grail Awards, FYI.
30 New Year’s Superstitions to Try for a Lucky 2026
Won't lie, I’ll try anything to make sure this year goes my way.
Do Hair-Growth Vitamins Work? 6 Supplements That Get Our Stamp of Approval
Consider this your definitive guide to the Wild West that is hair supplements.
Everything Dermatologists Recommend to Help Fade Acne Scars at Home—From Peels to Serums to LED Masks
No, you don’t need to get professional lasers and peels.
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