Ever since news broke back in April that Olivia Wilde was expecting her second child with fiancé Jason Sudeikis, we've been treated to some adorable photos of her growing baby bump. Most recently, the Vinyl star celebrated Bump Day on Aug. 3, a day designed to raise awareness about the need for maternal health care, by putting her belly on full display in a red bikini on Instagram. Of course, Olivia isn't the only star who appears to be enjoying her pregnancy. Behati Prinsloo and Bar Refaeli have also been taking to Instagram to share cute baby bump snaps over the past few months.
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