Katherine Heigl is mourning the loss of her old pal Eric Dane. In a new Instagram post on Sunday, the actress shared a super rare post, highlighting her feelings on her Grey's Anatomy costar's death. She shared a photo of herself and Eric, writing in the caption that this is way out of her comfort zone: "I debated this post for days. I have never been comfortable grieving publicly. I share my tears, my stories and my memories with those I'm closest to and more times than not I share them only with the heavens alone. But that silence can often look like a lack of care which I could not abide here." Addressing Rebecca Gayheart and her daughters Billie, 15, and Georgia, 14, specifically, the Izzie Stevens portrayer said: "Rebecca, Billie, Georgia... There is so little, if in fact anything, one can say about a tragic loss like yours. All the "I'm sorries" and " my prayers are with you" ring a bit hollow in the midst of so much pain and grief. So I will say the only thing that has ever brought me peace when I've lost someone I love. It is Robert Frost's poem " Nothing Gold Can Stay" of which I have tattooed on my body in my parent's handwriting so I will never forget that the moment of gold was worth it." Related: James Van Der Beek's Widow Mourns The Loss Of Eric: 'Will Miss Our Guys' Reciting Robert Frost's iconic poem, the 47-year-old wrote: ""Natures first green is gold, her hardest hue to hold. Her early leaf's a flower; but only so an hour. Then leaf subsides to leaf. So Eden sank to grief, so Dawn goes down to day. Nothing gold can stay." I will never forget Eric's gold and I will forever be grateful I got to bask in it for even a brief moment in time. Thank you for sharing him with us." Wrapping up, Katherine said: "God Speed my old friend...here's to your next great adventure." Aww... So beautifully said. See the post (below): View this post on Instagram A post shared by Katherine Heigl (@katherineheigl) Reactions to Katherine's heartfelt post, Perezcious readers? [Image via Hulu/YouTube/Apega/MEGA/WENN.com] The post Katherine Heigl Shares Rare Candid Post In Honor Of <i>Grey's Anatomy</i> Co-Star Eric Dane: 'God Speed My Old Friend' appeared first on Perez Hilton.