However, the 25-year-old contestant insisted that he is comfortable dancing in front of an audience.
He told TalkSport: "I'm not worried about dancing in front of other people, I'm just worried about dancing in front of [the band] and having them laugh at me."
Judd also revealed that he backed Danny Jones when he appeared on ITV1's Popstar to Operastar earlier this year.
"I like to remind Danny that I was constantly supportive of him during Popstar to Operastar," he added.
Strictly Come Dancing begins on Saturday at 6.10pm on BBC One.
> Strictly Come Dancing poll: Who is your favourite celebrity on the lineup?
Watch Harry Judd speak about Strictly Come Dancing below: