Looks like Drew Barrymore could be fighting some morning sickness.

On Monday, the Big Miracle actress, 37, bought her own snack to lunch with fiance Will Kopelman at Joan's on Third in L.A.: Premium Saltine Crackers! (See more pics at X17.)

It's just another not-so-subtle clue that Barrymore and art consultant Kopelman, 34, are expecting their first child together. Although Barrymore's did not reply to numerous requests for comment, Barrymore was spotted holding a sonogram outside a Beverly Hills doctor's office on Feb. 17, and a source confirmed to Us the couple are "excited" to welcome their baby.

Surrounded by his family, she and Kopelman got engaged over the 2011 holidays in Sun Valley, Idaho.

"Drew will be an amazing mom," one source told Us. "She's seriously the coolest person in the world . . . Very generous and doting."

Adds another insider: "She's ready to settle down and be a mom."