February 21, 2012 02:05 PM

Kevork Djansezian/Getty

Joe Nichols is expanding his family!

The country crooner, 35, and wife Heather are expecting their first child together this spring, his rep tells PEOPLE exclusively.

“After trying to have a baby for so long, we are thrilled to announce that I am pregnant,” Heather says.

Adds Joe, “I have to give all the credit to my wife — she has been a trooper through all of this, and I am so happy.”

The “Tequila Makes Her Clothes Fall Off” singer married his wife in September 2007 in Georgia, although the couple knew each other since age 19, when Joe performed in Heather’s father’s Texas club.

The Grammy nominee is already father to daughter Ashelyn, 13, from a prior relationship.

— Sarah Michaud

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