Olivia Wilde & Ahna O'Reilly: UNICEF's Masquerade Ball 2013

Olivia Wilde and her fiance Jason Sudeikis pair up while attending the 2013 UNICEF Masquerade Ball held at Hollywood Forever on Wednesday (October 30) in Hollywood.

The engaged couple, who just announced that they are expecting their first child together, were joined at the event by As I Lay Dying actress Ahna O’Reilly at the event.

Across the country, The Blacklist star Megan Boone attended the UNICEF Masquerade Ball held in New York City that same night.

“Maybe women’s mags should occasionally put a half naked dude on the cover, just to even out the newsstand,” Olivia tweeted that day. We sure wouldn’t complain!

FYI: Ahna is wearing a vintage dress, Jimmy Choo shoes, and a DVF bag. Jason is wearing a Gents 5 Star cap. Olivia is wearing an Alice + Olivia by Stacey Bendet top.

10+ pictures inside of Olivia Wilde and Ahna O’Reilly at the ball…