ByElise Jost, writer at Creators.co
"It's a UNIX system! I know this!"
Elise Jost

Every October, Planet Celebrity is rocked by the unspoken contest of coming up with the best possible #Halloween costume — but while the likes of model Heidi Klum will always go all out, donning prosthetics or sporting multiple outfit changes on the same night, sometimes a simple yet efficient costume is the best way to go.

Probably thanks to her experience with vampires, our '90s queen #SarahMichelleGellar knows how to pick the perfect spooky character for the last day of the month. This year, she showed up as one of #DC's most underrated characters, #PoisonIvy — seriously, where was the green lady in Suicide Squad?

Sarah Michelle Gellar Totally Pulled Off Poison Ivy

Red hair? Check. Green outfit? Check. Vines? Check. I didn't think I'd say this at Halloween, but we could actually use a #HarleyQuinn right now! The two have the cutest history in the comics, with Poison Ivy acting as a soothing remedy — despite her name — after Harley's damaging relationship with the Joker.

Let's also applaud SMG's safe bet to not rely on Uma Thurman's Poison Ivy costume in Batman & Robin, though the glasses are amazingly terrible too:

It's not the first time the vampire slayer has donned a superhero outfit, and it probably won't be the last.

Who did you dress up as this Halloween? We dressed up as Star Wars characters!