Jon Heder and Wife Expecting Baby No. 4 -- See Their Cute Announcement!

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The star of 'Napoleon Dynamite' announced the exciting news via Instagram.

Jon Heder is going to be a father of four!

The 38-year-old Napoleon Dynamite star recently took to Instagram to announce the exciting news that his wife, Kirsten, is pregnant.

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"Appropriate day to announce this. Gonna be a dad again!" he captioned a collage of pics featuring their kids and a chalkboard sign that read, "It's a… girl!"

"Kids had mixed reactions," Heder jokingly added. "Kidding, they're all excited! Due date's Christmas Eve though. Haha, sucker..."

The couple, who tied the knot in 2002, met when they were both students at Brigham Young University. They're also parents to a 9-year-old daughter, Evan, and two sons, Philip, 7, and Timothy, 2.

Congrats to the happy couple!

Back in June, Heder also took to the popular app to share a throwback snap of him and his family posing together. "Happy Father's Day, Dad," he wrote. "You are my greatest example."

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To hear more on how other celebrities celebrated the occasion, watch the video below.