Popsugar Celebrity Bikinis Hilary Duff Pregnant in a Bikini Pictures August 2018 Hilary Duff Bares Her Belly in a Bikini During a Beach Day With Boyfriend Matthew Koma 15 August 2018 by Britt Stephens View On One Page Photo 4 of 5 ADVERTISEMENT () Start Slideshow Share This Link Copy ← Use Arrow Keys → 4 Previous Next Start Slideshow BikinisHilary Duff Bikini PicturesCelebrity CouplesHilary DuffCelebrity Pregnancies