jsimpson091511_01_X17230WM.jpgJessica Simpson is expecting her first child with fiance Eric Johnson, according to In Touch Weekly.

A source tells the mag the 31-year-old singer is "already having kooky cravings!" A few of Jess' must-have pregnancy cravings ... nacho chips dipped in chocolate, cheese-flavored popcorn and non-alcoholic margaritas. The source adds it's a way for Jess to "satisfy her urge for salty and sweet."

Simpson and Johnson are expected to tie the knot in November. Since her baby bump will be visible by the wedding date, the source tells In Touch she "might have to take out her dress a bit."

In Touch claims Simpson is due next spring.