Pregnant Rumer Willis Shows Baby Bump in Activewear

Rumer Willis is in mom-on-the-go mode as she prepares for her first baby.

The Once Upon a Time in Hollywood actress, 34, showcased her growing baby bump as she stepped out Monday to run errands in a black and white two-piece Losano activewear set.

The star, who announced her pregnancy last month with boyfriend Derek Richard Thomas, paired the brand’s Showstopper Sculpted Bra with the Criss-Cross Pocket Legging, layering the look with an open button-down black shirt, while carrying a Warmies stuffed dog.

Rumer shared her pregnancy news days before Christmas with photos of her displaying her bump in a skintight black catsuit, including one snap of Thomas kissing her stomach.

She captioned the photo with a seedling emoji.

The mother-to-be is the oldest daughter of Bruce Willis and Demi Moore.

RELATED VIDEO: Rumer Willis Is Pregnant! Actress Expecting Her First Baby with Boyfriend Derek Richard Thomas

Moore recently gave her Instagram followers a glimpse of her daughter’s journey to motherhood sharing a photo of a recent ultrasound appointment, where they were joined by Rumer’s sisters Scout Willis and Tallulah Willis.

“Saying hello to the little nibblet!!” Moore, 60, captioned a photo on the appointment.

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“Overjoyed for you, my sweet Rumer. It’s an honor to witness your journey into motherhood, and can’t wait to welcome this baby into the world!”