VIDEO : Hilary Duff Shares a Throwback Pic of Her Sister and Her on Instagram

A photo posted by Hilary Duff (@hilaryduff) on Jun 9, 2016 at 12:54pm PDT Prince George who? Hilary Duff and Mike Comrie Are the Friendliest of Exes While Coming Together for Luca's Birthday Stefanie Keenan/WireImage Right before Hil's throwback hit Instagram, Haylie beat her to it, posting a photo that appears even older than Hilary's.