Actress Halle Berry is pregnant with her second child, her first with fiance Olivier Martinez.

Berry's representatives made the announcement but gave no details.

However celebrity news website TMZ, citing sources close to the couple, said Berry was about three months pregnant and is expecting a boy.

The 46 year old star has a five-year-old daughter, Nahla, with ex-boyfriend, Canadian model Gabriel Aubry.

After a long and acrimonious battle for custody, Berry and Aubry finally reached an agreement in November.

The Oscar-winning "Monster's Ball" star and French actor Martinez, 47, have been engaged since March 2012.