Jillian Holtzmann (played by Kate McKinnon) is the quintessential mad scientist type. If there is trouble to get in - as long as it's scientific - Holtzmann is there. Whether it's ghosts, laser technology, or nuclear theories, Jillian Holtzmann is up for it. It puts her in the line of fire more often than not. But if it keeps her friends safe, that's where she wants to be.

For any Ghostbusters costume you're going to need a few things: a tan jumpsuit, a Ghostbusters patch, a name tag, and a proton pack. You can go for a more screen-accurate pack (top) or an inflatable one that is more affordable (bottom). You will also want a pair of sturdy boots that you can run it but also walk over debris in. After all, those proton packs do some serious damage and not just to ghosts.

When cosplaying Jillian specifically you'll want a long blonde wig you can style after her hair. You'll also want two pair of yellow-lensed protective goggles and a green protective gloves. Finally you will need reflective safety tape and fabric glue to keep it in place.

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