Kimberly wore a pretty yellow gown that highlighted her growing baby bump as she supported James at a screening of his new movie Labor Day on Saturday (7 September).
Former Dawson's Creek star James and wife Kimberly confirmed their happy baby news via a post on Kimberly's Old School, New Rules blog in August.
"All of the craziness, exhaustion and moodiness aside, James and I are beyond elated and feeling so incredibly blessed," wrote Kimberly.
The couple are already parents to daughter Olivia, born in 2010, and son Joshua, born in 2012.
"Olivia and Joshua are in on the news and seem to be excited about a baby coming into the family," wrote Kimberly. " And James, thank you for being the loving, caring and understanding husband and father that you are."
James added on his Twitter account: "Really appreciate all the love and support on the baby announcement... thanks guys."