The country star and wife Joan welcomed son Cash on Sunday in Nashville

By Rennie Dyball
Updated January 11, 2010 05:45 PM
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Frederick Breedon/NBC

Call them Big & Rich … & Baby.

John Rich, one half of the country duo Big & Rich, and his wife Joan welcomed their first child, a son, his rep confirms to PEOPLE.

Cash Rich made his debut early Sunday morning at a Nashville hospital. John, 36, and Joan, 40, wed in 2008 after quietly dating for more than five years.

The couple announced the pregnancy in October.