Rob Gronkowski was all smiles Monday night as he helped make the day of a Pembroke, Massachusetts, girl recovering in the hospital.

Ten-year-old Katie was diagnosed with Ulcerative Colitis about one year ago. She was being treated up until three months ago, when she had a significant flare which ultimately caused her to undergo surgery last Wednesday. Katie is recovering, but has a long road ahead of her.

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Katie was at Boston Children's Hospital Monday when Gronk stopped by to share some well wishes.

Naturally, Gronk was sporting a Patriots onesie.