Skip Nav
Love It. Save Your Favorites Now.
40 Best Sister Costume Ideas For Halloween
View On One Page
Photo 3 of 41  
ADVERTISEMENT ()
3

Sister Halloween Costumes: Alex and Annie Mack From "The Secret World of Alex Mack"

  • What to wear: Alex needs a striped t-shirt, overall shorts, a sweatshirt tied at the waist, and a backwards baseball cap. Annie is dressed conservatively with a lab coat.
  • How to act: If you're Alex, try to turn things on with your newfound powers. Morph into silver liquid if possible. For Annie, talk about your big-girl job at the lab.
Previous Next
Angourie Rice on Writing, Acting, and Friendships
Books
Angourie Rice on How Connection Fuels Her Creativity
by Lena Felton 5/15
Off Campus Popsugar Pulse Cover: Shop the Outfits
TV
Shop the Date-Ready Looks From Our "Off Campus" Cover
by Jessica Andrews 5/13
In Praise of How Devil Wears Prada 2 Treats Being Child-Free
Fertility
The Romance in "Devil Wears Prada 2" Was Underwhelming — and That's Kind of the Point
by Kristine Thomason 5/05
Shop the "Wuthering Heights" Aesthetic
Margot Robbie
Margot Robbie's "Wuthering Heights" Aesthetic Is the Perfect Mood Board For Spring
by Naomi Parris 3/04
Shop Adrienne Bailon-Houghton's Outfits in "Chef's Kiss"
Fashion Shopping
Adrienne Bailon-Houghton's "Chef’s Kiss" Wardrobe Deserves a Starring Role
by Haley Lyndes 2/10
Margot Robbie's "Wuthering Heights" Home Tour
Margot Robbie
Margot Robbie’s "Wuthering Heights" Home Is Basically a Gothic Fairy Tale IRL
by Haley Lyndes 2/05

From Our Partners

Now You Know

Love Is Blind: Where Do Those Engagement Rings Come From?

Fashion

Everything to Know About the "Love Is Blind" Engagement Rings

by Sarah Wasilak 2/19

shopping

Oprah's Favorite Things List Has Major Gems, Including an Under-$100 Air Fryer

by Balim Tezel 11/06/25

Fitness

Paralympians Earn the Same Pay For Medals as Olympians, but Is It Enough?

by Karenna Meredith 8/29/24

health

How Often Should We Be Getting COVID Vaccines?

by Alexis Jones 8/23/24

Food

Pumpkin Spice Season Is Back Aug. 22

by Lauren Mazzo 8/21/24

Beauty

The Exact Red Lipstick Alexandria Ocasio-Cortez Swears By

by Alaina Demopoulos 8/20/24

health

What to Know About the Latest Mpox Outbreak, According to MDs

by Alexis Jones 8/16/24

health

Céline Dion Promised Her Children She’d Live: “They Already Lost a Parent.”

by Sara Youngblood Gregory 6/11/24

Latest Entertainment
We're Hiring! Write For Us Advertise With Us Accessibility Contact Archives
Power Your Happy
Terms Privacy Policy
©2026 Vox Media, LLC. All Rights Reserved.