The former 'Hills' and 'Laguna Beach' beauty revealed her and partner Mark Ballas have been "getting a lot done" throughout their training programme, but the professional dancer is "not very happy" about having such an early start.
She told MTV News: "Mark and I have been rehearsing since eight in the morning, which Mark's not very happy about.
"But it's been a good day. We're getting a lot done. We've been here for five hours almost, so we're a little sweaty, but it's been fun."
The pair scored 19 out of a possible 30 during last week's season premiere of the show - which also stars Chaz Bono, Ricki Lake and Robert Kardashian - and Kristin admitted she is a complete beginner when it comes to the dancing style.
She added: "I don't have any dance experience, so this is very new for me. I'm out of my element here. The only style of dance I would do is like bop around at a club."