The baby will be the first for the singer and designer and her fiance, Eric Johnson. Simpson has been the subject of baby speculation for months, thanks to an increasingly undeniable baby bump she's been sporting during recent outings in Los Angeles, New York and elsewhere.
Yale grad and former NFL pro Johnson, 32, proposed to Simpson in November 2010 after about six months of dating.
And, indeed, Simpson tweeted of a prescient dream in March 2011. "Dreamt that I had a son named Tenacious D," she wrote. "That was a strange one."
The star's wedding plans, however, are still up in the air. "She can't figure out what kind of day she wants. Some days she wants a big wedding in Hawaii, then other days she wants something closer to home," a pal recently told new Us Weekly.