'Stranger Things' Star Caleb McLaughlin's Tips to Be Him for Halloween

Way before Caleb McLaughlin's "Stranger Things" character become a hot Halloween costume ... Caleb was slaying chicks with his Halloween swagger.

No doubt the kiddos from the hit Netflix show will be a popular costume idea this year, especially because season 2 drops around that time. So, when we got 15-year-old Caleb -- who plays Lucas -- we asked his fave costume of all.

Let's just say Caleb's Halloween game's been strong since he was a real young tyke!

If this inspires you to be more like Lucas -- Caleb broke down the 3 things you'll need to pull it off.