James Van Der Beek and wife welcome a son

LOS ANGELES, CA - JANUARY 11: Actor James Van Der Beek (R) and wife Kimberly Brook attend the premiere of Open Road's "The Grey" at Regal Cinemas L.A. LIVE on January 11, 2012 in Los Angeles, California. (Photo by David Livingston/Getty Images)
David Livingston
James Van Der Beek and his wife, Kimberly, attend the premiere of "The Grey" on Jan. 11, 2012, in Los Angeles.

(CBS News) It's a boy for actor James Van Der Beek and his wife, Kimberly.

The couple welcomed a son on Tuesday, the former "Dawson's Creek" star told fans on Twitter.

Pictures: Celebrity babies

Van Der Beek, 35, wrote:

Later that day, his wife also shared the big news with her Twitter followers:

The baby boy joins the couple's 17-month-old daughter, Olivia.

Van Der Beek will return to TV on April 11, in the new ABC series "Don't Trust the B---- in Apt. 23."