PHOTOS: Fiona's going to be a big sister! A look at our favorite hippo over the years.

Really BIG news: 4,500-pound male hippo moves in with Fiona and her mom
Fiona Cincinnati Zoo
Fiona
Henry, father of Fiona the hippo, is fighting for his life
Fiona Proposal
Fiona the hippo
Fiona
Fiona the hippo
Fiona the hippo
Fiona the hippo
Fiona the hippo
Fiona the hippo
Fiona the hippo
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The Fiona Show: Cincinnati Zoo’s hippo gets her own Facebook series
The Fiona Show: Cincinnati Zoo’s hippo gets her own Facebook series
Fiona the hippo part of Graeter’s new zoo-inspired flavor
Why you may not see Fiona’s dad, Henry, at the Cincinnati Zoo
Fiona’s big adventure: Cincinnati Zoo hippo explores outdoor pool
Baby hippo Fiona reunited with her mom
Fiona’s big adventure: Cincinnati Zoo hippo explores outdoor pool
Fiona’s big adventure: Cincinnati Zoo hippo explores outdoor pool
PHOTOS Fiona at the Cincinnati Zoo
PHOTOS Fiona at the Cincinnati Zoo
PHOTOS Fiona at the Cincinnati Zoo
PHOTOS Fiona at the Cincinnati Zoo
PHOTOS Fiona at the Cincinnati Zoo
PHOTOS Fiona at the Cincinnati Zoo
PHOTOS Fiona at the Cincinnati Zoo
PHOTOS Fiona at the Cincinnati Zoo
PHOTOS Fiona at the Cincinnati Zoo
PHOTOS Fiona at the Cincinnati Zoo
PHOTOS Fiona at the Cincinnati Zoo
PHOTOS Fiona at the Cincinnati Zoo
PHOTOS Fiona at the Cincinnati Zoo
Cincinnati Zoo baby hippo update: Fiona has been taken off oxygen
Fiona goes for a swim — and the Internet goes crazy
Cincinnati Zoo baby hippo update: Fiona has been taken off oxygen
Cincinnati Zoo baby hippo update: Fiona has been taken off oxygen
Fiona the hippo photobombs couple's engagement in epic fashion
Cincinnati Zoo’s baby hippo Fiona gets ready to meet her parents
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Too cute! Baby hippo Fiona catches a glimpse of her parents
How long can Fiona rely on her cute appeal?
Cincinnati Zoo’s baby hippo Fiona gets ready to meet her parents
How long can Fiona rely on her cute appeal?
Hippo Kiss
Henry the hippo, dad of adorable Fiona, dies in Cincinnati
BEHIND THE SCENES: Take a look at what Fiona and Bibi are up to after hours
BEHIND THE SCENES: Take a look at what Fiona and Bibi are up to after hours
BEHIND THE SCENES: Take a look at what Fiona and Bibi are up to after hours
BEHIND THE SCENES: Take a look at what Fiona and Bibi are up to after hours
BEHIND THE SCENES: Take a look at what Fiona and Bibi are up to after hours
BEHIND THE SCENES: Take a look at what Fiona and Bibi are up to after hours
BEHIND THE SCENES: Take a look at what Fiona and Bibi are up to after hours
BEHIND THE SCENES: Take a look at what Fiona and Bibi are up to after hours
BEHIND THE SCENES: Take a look at what Fiona and Bibi are up to after hours
BEHIND THE SCENES: Take a look at what Fiona and Bibi are up to after hours
BEHIND THE SCENES: Take a look at what Fiona and Bibi are up to after hours
BEHIND THE SCENES: Take a look at what Fiona and Bibi are up to after hours
BEHIND THE SCENES: Take a look at what Fiona and Bibi are up to after hours
BEHIND THE SCENES: Take a look at what Fiona and Bibi are up to after hours
BEHIND THE SCENES: Take a look at what Fiona and Bibi are up to after hours
BEHIND THE SCENES: Take a look at what Fiona and Bibi are up to after hours
BEHIND THE SCENES: Take a look at what Fiona and Bibi are up to after hours
Fiona, famous zoo hippo born premature, reaches 1,000 pounds
Hippo from San Antonio invites Fiona to 'swipe right,' meet some day
BEHIND THE SCENES: Take a look at what Fiona and Bibi are up to after hours
Happy birthday Fiona! Celebrate the famous hippo and help injured animals in Australia
BEHIND THE SCENES: Take a look at what Fiona and Bibi are up to after hours
Coronavirus: Cincinnati Zoo to start Home Safari Facebook Live for kids home from school
Happy birthday Fiona! The Cincinnati Zoo’s beloved hippo turns 2
Happy birthday Fiona! The Cincinnati Zoo’s beloved hippo turns 2
Happy birthday Fiona! The Cincinnati Zoo’s beloved hippo turns 2
Hippos
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Tucker, an 18-year-old hippopotamus from the San Francisco Zoo, has moved into Hippo Cove at the Cincinnati Zoo & Botanical Center with Fiona and her mother, 22-year-old Bibi. CINCINNATI ZOO & BOTANICAL CENTER