James Van Der Beek is going to be a dad again.

The former 'Dawson's Creek' star - who already has a 13-month-old daughter Olivia with his second wife Kimberly Brook - revealed on his twitter page that his spouse is pregnant again.

He wrote: "Just when we thought we couldn't feel any more blessed, it seems the universe has plans to give our daughter a sibling... #humbled (sic)."

He has not revealed when the baby is due or if they know its gender.

James often takes to twitter to gush about fatherhood, recently writing about Olivia on her first birthday last month.

He said: "The cliche about fatherhood that's the most true: It goes so fast. Happy first birthday, little miss thing. I love you beyond...(sic)"

James and Kimberly started dating in July 2009, one month after he separated from first wife Heather McComb and the couple married in a Kabbalah ceremony in Israel in August 2010 before Olivia was born.

After the ceremony James wrote: "Best day of my life so far.

"The woman I love did me the honor of became my wife today... I look forward to earning her for the rest of my life. (sic)"