Dion and husband René Angelil already have a 9-year-old son named René Charles.
"We're ecstatic," Angelil told People. "Celine is just hoping for a healthy pregnancy. She was hoping for one baby and the news that we are having two is a double blessing."
In August, the 42-year-old singer's rep confirmed Dion was pregnant with her second child, but it was later discovered that the in-vitro was unsuccessful.