Beyoncé has opened up about her pregnancy with rap mogul Jay-Z, admitting that she presumed everybody knew about the baby - despite it being kept a secret.

The couple announced in August this year that they were having a baby, prompting the internet to go wild with talk of their future child.

But the singer has revealed that she struggled to keep the pregnancy secret, assuming that people could tell, ruining the surprise. Speaking at a screening of her new DVD on Sunday (November 20) she said:

"The whole time I definitely was thinking, 'Everyone knows, everyone can see'."

She also added that she has been finding it increasingly difficult to perform dance routines whilst singing at the same time, leaving her out of breath.

Watch Beyoncé announce her pregnancy at the MTV VMA Awards in August below: