Hilary Duff blonde pregnant sharky's Hilary Duff only gave birth in March, yet she's already dropping serious pregnancy pounds! Her dedication to pilates sure has paid off!

The Lizzie Maguire star has really taken to motherhood, and time flies when you're having fun! Today she tweeted: "It's Luca's 1 month old birthday!!! I can't believe how quickly a month has gone by! what a lovely blessing we received. #perfectionbaby :)"

Looks like little Luca is lighting up his mom's world! Aww cute.