Jennifer Love Hewitt  is about to add mommy to her resume.  The Client List  starlet, 34, is expecting a child with costar and real-life beau  Brian Hallisay , her rep confirms to PEOPLE.  “This is a wonderful time and we are looking forward to starting our family together,” a statement reads.  The baby on the way will be the first for Hewitt and Hallisay, 34.  In addition to her acting, the mom-to-be has also been a strong supporter of embracing a woman’s body  — curves and all! — after unflattering photos of the actress on the beach surfaced in December 2007.  “Love what you look like right now — and remember I said it 10 years  from now because it’s the greatest gift I can give,” Hewitt told PEOPLE  after debuting her new svelte shape in June 2010.   Despite loving the skin she’s in, Hewitt may ride out her pregnancy in her favorite attire : sweats!  “This is going to sound weird, but I’ve cut down on the lingerie a  lot in my own life because I wear it all the time [on TV],” sh...