By peoplestaff225
Updated April 17, 2010 07:00 AM
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Happy birthday Jennifer Garner!

The actress — who’s mom to Violet, 4, and Seraphina, 15 months — turns 38 today. And she couldn’t look any better. While out and about the kids, she keeps it casual in jeans and sneakers. But when she hits the red carpet, she glams it up — big time — in fancy haute couture.

Want to see how this style chameleon makes the transformation? See more photos in our new gallery!

Tell us: What do you think of Jennifer Garner’s mom to movie star style?