Fiona is about to turn 4: Here are some of our favorite moments Fiona has captured hearts online since her birth on Jan. 24, 2017. (Photo courtesy of Cincinnati Zoo/Lisa Hubbard) By Maggy Mcdonel | January 22, 2021 at 4:11 PM EST - Updated January 22 at 4:11 PM CINCINNATI (FOX19) - Fiona the hippo became an overnight celebrity when she was born on Jan. 25, 2017, and she’s been making headlines ever since. Born six weeks before her due date at 29 pounds, the little hippo was in around the clock intensive care at the Cincinnati Zoo & Botanical Garden. Fiona is celebrating her 4th birthday (Source: Cincinnati Zoo) Saturday, Jan. 28, 2017