Hilary Duff blonde denim son smile purse

On Wednesday Hilary Duff took her adorable son Luca to a Mommy and Me class, and she was beaming when we snapped her picture on the way out.

Not only does Hil have a few new projects in the works (she inked a talent and development deal with 20th Century Fox TV last summer ... can't wait to see what comes from that!), but by the looks of it, she's definitely dropped quite a few pounds. Yesterday the 25-year-old starlet posted an impressive snapshot from her Pilates class, so not only is she sweating it out and getting her pre-baby body back, but she's definitely more flexible now than ever before.