The singer married Wissam al Mana, a Qatari billionaire businessman, in 2012, and the couple live in Dubai.
In April this year, she announced that she was taking a break from her tour to start "planning our family" and "rest up."
She had not confirmed pregnancy rumours, however, until the publication of People magazine on Wednesday.
The magazine carried an exclusive photograph of a smiling Jackson with her hand on her stomach.
"We thank God for our blessing," she said, giving no further details.[Telegraph]
