Country star Zac Brown is set to become a father for the fifth time.

The Zac Brown Band frontman's wife, Shelly, is pregnant with a younger sibling for their four daughters, who are all aged between six and two.

A representative for the singer tells, "We're excited to share the news that Zac and Shelly are expecting a new baby in early 2014."

The musician is no stranger to big families - he is the 11th of 12 kids himself.