Actor James Van Der Beek and his wife Kimberly are expecting another baby. Kimberly broke the news on Instagram Thursday that she and the 38-year-old former "Dawson's Creek" star are gearing up for baby No. 4.

"So grateful to share with you today that we're pregnant with our fourth child!" she wrote alongside a black-and-white photo of the pair smiling. Kimberly's hubby reposted the photo on Instagram, with the caption, "Feeling ridiculously blessed."

The "CSI: Cyber" actor also took to Twitter to thank those that keep his family's secret, writing, "And to any of those who may have known our news, but were kind enough to wait until we were ready to announce, may good karma be upon you."

The couple has not revealed any additional information about Kimberly's pregnancy, including the baby's gender or Kimberly's due date. The Van Der Beeks, who got married in 2010, are already parents to three children - five-year-old Olivia, three-year-old Joshua and 21-month-old Annabel, whom they welcomed in January 2014.

Hours before the couple announced their exciting news, a source told Us Weekly that Kimberly was spotted wearing a loose sweater and sporting a "noticeable" baby bump while dining with her husband at Caulfield's Bar and Dining Room in Beverly Hills.