The former Olympic skater, 56, made the announcement at the end of the episode just before the season's first celebrity was to be eliminated from the competition.
"I've taken the advice of my spine surgeon and I need to withdraw from the competition. I have an injury that could be irreparable and nerve damage and it would be completely unfair for me to stay in this and have any of these people go home. I can't do what I need to," Hamill said, her voice shaking, as her professional dance partner Tristan MacManus stood by her side.
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