Brooklyn Decker and Andy Roddick have revealed that they're expecting their first child.

Model and actress Decker announced the happy news on Instagram, posting a picture of her holding her baby bump along with the caption: "So this happened… #the3ofus."

Her representative told People: "I’m happy to confirm Brooklyn and Andy are expecting a new addition to their family in the autumn of this year."

Decker and former tennis player Roddick wed in 2009 in their Texas home.