The 29-year-old, who is expecting her first child with fiance and actor Jason Sudeikis, made an appearance Tuesday at the International Women's Media Foundation 2013 Courage in Journalism Awards here, reports dailymail.co.uk.
Wilde completed the look with heels and a small clutch bag. She had left her hair flowing loose around her shoulders.
The actress met Sudeikis on the season finale of "Saturday Night Live" in 2011 and they started dating six months later.
The couple got engaged in January 2013 and are set to wed in New York City next spring.
Wilde was previously married to Italian filmmaker and musician Tao Ruspoli. They divorced in 2011.