Rascal Flatts's guitarist Joe Don Rooney, 38, and wife Tiffany Fallon are expecting their third child in late summer, his rep confirms to PEOPLE exclusively.
They are already parents toJagger Donovan, 5½, and Raquel Blue, 3½.
"We are so thrilled and feel so blessed to bring another little angel into our world," the couple tell PEOPLE. "Jagger and Rocky are very excited too. They're going to make a great 'big brother-big sister duo' as the Rooney circus continues."