Ethan Hawke to be a father for the fourth time

(CBS) Ethan Hawke and wife Ryan Shawhughes are expanding their family.

Shawhughes is pregnant with the couple's second child, People magazine confirmed Thursday

Pictures: Celebrity baby bumps

The couple married in June 2008, and welcomed daughter Clementine Jane a month later.

Shawhughes is "five months along, totally showing," a source told Us magazine. "They don't know the gender, but...Clementine really wants a little brother!"

Hawke, 40, also has two children from his marriage to Uma Thurman - Maya, 12, and Levon, 9. They divorced in 2004 after six years of marriage.

Shawhughes once worked as a nanny to the Hawke's children with Thurman.

The actor's rep had no comment.