Sarah Michelle Gellar Dresses as Harley Quinn for Jessica Seinfeld's GOOD + Halloween Bash!

Sarah Michelle Gellar channels Harley Quinn on the orange carpet as she attends Jessica & Jerry Seinfeld’s GOOD + Halloween Bash at the Sony Pictures Studios on Sunday (October 28) in Culver City, Calif.

The 41-year-old actress was joined at the event by Matthew Morrison, his wife Renee Puente and their 1-year-old son Revel (all dressed in Ghostbusters characters), Nate Berkus and his hubby Jeremiah Brent with their two kids – Poppy and Oskar, Heather Morris, her husband Taylor Hubbell and their two kids – Owen and Elijah, and a Star Wars decked out Ike Barinholtz with his wife Erica Hanson and their children – Payton and Foster.

Also in attendance was host Jerry Seinfeld and his wife Jessica dressed as Little Red Riding Hood and the Big Bad Wolf, as well as Sean Patrick Thomas, who rocked a Spider-Man costume.

Sarah and Sean starred in 1999′s cult classic Cruel Intentions together.