Olivia Wilde: Terry Richardson Costume on Halloween!

Olivia Wilde checks messages on her phone while out and about with a gal pal on Friday (November 1) in Los Angeles.

“Best Halloween of all time. Thanks @arcadefire and @Terry_World,” the 29-year-old pregnant actress tweeted with a pic of herself dressed as photographer Terry Richardson.

PHOTOS: Check out the latest pics of Olivia Wilde

She added, “Gaaaaahhh I can’t believe I missed a pun opportunity! You see last night on Halloween I got Terry-fied… Ok I’m done now thanks gbye.”

Earlier in the week, Olivia and fiance Jason Sudeikis attended the 2013 UNICEF Masquerade Ball in Hollywood.

15+ pictures inside of Olivia Wilde spending time with a gal pal…