By Meghan Overdeep
Updated Oct 19, 2015 @ 9:30 am
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Credit: Jon Kopaloff/FilmMagic

It's only been a week since Chrissy Teigen and husband John Legend announced that they're expecting and Teigen's bump has already popped!

The 29-year-old model posted a bathroom mirror selfie of her brand-new baby bump to her Instagram account and it looks like baby has been busy. Accentuated by a skin-tight black dress and a fluffy white cardigan, Teigen's stomach has grown substantially in the week since her last red carpet appearance.

"Somebody is early to the party," Teigen captured the photo of her changing silhouette.

It seems like Teigen been taking Kim Kardashian's advice about maternity fashion choices. "Kim told me to go stretchy for everything, so I'm going stretchy," she told InStyle at La Mer's 50th anniversary celebration last week.

Teigen has been characteristically candid about her pregnancy thus far, tweeting about everything from morning sickness to food cravings. We can't wait to see what the star shares next about this exciting time in her life.