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The sentimental message was paired with a photo of the toddler, who had been diagnosed with a brain tumor in 2016. Henry's cancer had returned despite surgery and other treatments and he died earlier this year, according to a Facebook post by Delaney.

\"PHOTO:
Mike Marsland/WireImage/Getty Images
PHOTO: Rob Delaney attends the BAFTA Television Craft Awards held at the Brewery, April 22, 2018, in London.
>

\"My wife and Henry's older brothers and I are devastated of course. Henry was a joy. He was smart, funny, and mischievous and we had so many wonderful adventures together, particularly after he'd moved home following 15 months living in hospitals,\" Delaney wrote in February.

He added, \"Thank you, beautiful Henry, for spending as much time with us as you did. We miss you so much.\"

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