Jake Gyllenhaal spent Halloween with Reese and her kids trick-or-treating. Reese Witherspoon dressed as a witch and Jake in full ape garb.
"They were holding hands and swinging them in the air as they walked around the neighborhood," adds a witness, who says Gyllenhaal often lifted up his gorilla mask to smooch his Rendition co-star. "Reese was laughing at everything Jake was saying."
As Ava (also in witch wardrobe) and Deacon (dressed as a super hero) ran up to every door for treats, "Reese and Jake waited on the sidewalk and flirted," the onlooker tells Usmagazine.com.
They even started to act like a pair of giddy kids themselves.
"Jake tapped Reese on the butt and then she hit him back — they began running a circle hitting each other!" the witness says. "Then Jake picked Reese up off her feet and she screamed."