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By Gena Oppenheim

Olivia Wilde looks like she's ready to pop! On Feb. 24, the expectant first-time mom took to Facebook to share a photo of her almost cooked bun in the oven.

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"Sure I've looked like this after Mexican food but this time it's a BABY. #almostcooked #nineweekstogo," the "Tron: Legacy" actress wrote next to a cute picture of her baby bump.

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But soon enough the star will have to ditch that trendy backpack for a diaper bag because her due date is coming up quickly!

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Olivia is expecting her first child, due on May 4, with her fiance Jason Sudeikis.