Oscar-winning actress Julia Roberts (search) is pregnant with twins, according to magazine reports.

People magazine reported Monday night that Roberts' spokeswoman, Marcy Engelman, said the "Pretty Woman" (search) star was due to give birth to twins early next year.

US Weekly said Roberts, 36, has been pregnant for about nine weeks with twins. Star magazine, citing unidentified sources, said the twins were a boy and a girl.

Roberts, who won the best actress Oscar in 2001 for "Erin Brockovich," married cinematographer Daniel Moder (search), 35, in July 2002 at her home in New Mexico. The twins would be the first children for Roberts, who starred in 1990's "Pretty Woman."

Engelman told People magazine that twins run in Roberts' family, with her great-grandmother and a pair of cousins born as twins.