Zac Hanson's wife Kate is expecting their third child.

The couple already have kids Shepherd, five and two-year-old Junia Rosa Ruth together and can't wait for the latest addition to their family to arrive later this year.

Zac, 27, told People.com: ''We are so happy and thankful to add more life and love to our family!

''It's fun this time to watch the little ones so excitedly anticipating their new sibling.''

Zac's older brother Issac, 32, has two children, Everett, six, and Monroe, four, with his wife Nicole, while their other sibling Taylor, 29, and his wife Natalie welcomed their fifth child, daughter Wilhelmina Jane, in October 2012.

Announcing the birth, Taylor said: ''Natalie and I are thrilled to announce the arrival of our newest family member, Wilhelmina Jane Hanson. She arrived on Tuesday, October 2, and was welcomed by more love than could fit in the room.''

The proud parents turned to the readers of the unique baby names website Nameberry.com for help choosing her name.

Natalie said: ''Thinking back on all the children's names has helped give me a fresh perspective in choosing the name for the baby girl we are expecting in the fall. It has helped remind me how the right name seems to come at the right time, and how, no matter how 'perfect' the choice, it will only be a part of all this little person will become.''

The couple married in June 2002 and are already parents to Ezra, 10, Penelope, eight, River, six and four-year-old Viggo.