Pregnant Hilary Duff Conceals Her Teeny Baby Bump (PHOTOS)

Youngest Celeb Moms!
These ladies are cool moms!
Bump watch, the Hilary Duff edition, is in full force!

The 23-year-old actress was seen attempting to cover up her teeny bump as she made her way to an appointment in LA on Thursday. Always stylish, HD was wearing (despite the SoCal heat wave!) a sweater, jeans and a red top.

Although she announced her pregnancy a couple of weeks ago, she is serious about staying fit!

Hilary not only has been seen outside the gym, but tweeted about her exercise regimen!

“viveca @Piloxing will kick my butt every time! Xxo!”

Take a look at the rest of the photos in the gallery!

Tags: Hilary Duff