If you want to be terrifying and trendy, pick one of these costumes this Halloween!

HalloweenCostumes.com is the largest online - only Halloween retailer. The site has released its list of most popular costumes for both children and adults.

10. Spider - Man

9. Z-O-M-B-I-E-S (Disney Channel original movie)

8. Game of Thrones

7. Deadpool

6. Harry Potter

5. Rick And Morty

4. Stranger Things

3. Wonder Woman

2. Black Panther

1. The Incredibles

Meanwhile, The National Retail Federation says these are the most popular pet costumes this year:

5. Cat

4. Devil

3. Bumblebee (insect, not the robot!)

2. Hot dog

1. Pumpkin

So if you see a lot of Spider - Men walking around with bumblebee dogs on Halloween night, you'll understand why!