Speculation has swirled suggesting the 'Dallas Buyers Club' star is pregnant yet again after she was photographed on two separate occasions in July, showing off what appeared to be a baby bump, reported People magazine.
"The reports that she and Ben are expecting their fourth child are simply not true," the representative said.
The couple are parents to children Violet, eight, Seraphina, five, and Samuel, two.
The film stars, who wed on a beach in June 2005 after dating for 10 months, have been fiercely devoted to their family.