Brad Paisley and Kimberly Williams-Paisley
Alex Berliner/Berliner Studio/BEImages
"We're having so much fun with our little boy Huck, and we are thrilled that he will have a sibling," says the expectant mom, who is due in April. "He's going to be a great brother."
The couple's first child, who's named for Mark Twain's character, was born on Feb. 22 last year.
Williams-Paisley, 37, is currently in L.A. shooting the season finale of According to Jim. Her husband, 35, is set to host the 42nd annual Country Music Association Awards with Carrie Underwood in Nashville on Nov. 12.
• For more information on Kimberly?s pregnancy, visit PEOPLE's Celebrity Baby Blog
