Tiffany Fallon

Credit: Rick Diamond/ACM2009/Getty

Babies

Baby No. 2 on the Way for Rascal Flatts's Joe Don Rooney

Originally posted 03/09/2010 12:55PM

Make way for another little rascal: Joe Don Rooney and wife Tiffany Fallon are expecting their second child, he tells PEOPLE exclusively.

"We're a little more prepared but the same excitement is there," the Rascal Flatts guitarist says of baby No. 2. The couple are already parents to 21-month-old son Jagger Donovan. "There's such fulfillment in being a father and it's going to be two-fold now, which is so cool."

Fallon, 35, who is due in September, told Rooney, 34, that she was pregnant when they were staying in the same Los Angeles hotel where he learned they were expecting Jagger.