Is Rob Kardashian ready to doff to his top and wear sequined spandex on Dancing with the Stars?
Not exactly. Reality TV's most famous kid brother, 24, makes his debut on the dance competition Monday night with pro partner Cheryl Burke -- and admits to Us Weekly (in a new exclusive, weekly chat) that costume fittings are just "whatever" for him right now.
"If I was in better shape, I honestly wouldn't care," explains Kardashian, who revealed last month that he now weighs over 200 pounds and wants to slim down during the show. "Obviously I'm a little insecure about certain things right now...I'm just not used to dancer clothes."
In rehearsals, Kardashian says he's noticed a "little" change in his body. "I still eat pretty bad," he admits, "If I were to take it another level up and eat well, I feel like I would notice more of a change."
The star wants his weight to drop down to the "180s," and admits that he's indulged in pizza, donuts and ice cream at the studio.
And his entire famous family will be in the audience for Monday's show, he confirms: "All of my sisters, my mom [Kris Jenner] and Bruce."
Thankfully, he hasn't had any rehearsal meltdowns -- yet. "We will make it work, and [Cheryl] won't make me look crazy. I've definitely gone home during the first week and been exhausted and, like 'What am I doing?! This is so hard and so frustrating!' But if I can do this, then anyone can -- I have no rhythm, and I'm not crazy-coordinated."
His newlywed sister Kim, 30, hasn't offered any makeup advice so far. "I hate the makeup!" he tells Us. "I really hate that part, but I gotta just deal with it."
In the meantime, he's been sizing up the competition -- including Chaz Bono, the show's first-ever transgendered contestant. "He's a cool guy, and funny -- and he dances pretty good, actually," he says, dismissing the controversy over Bono's part in the show. "I just don't care about all that stuff. You are who you are, and it has nothing to do with anyone else."
The show's biggest hottie? Sorry, Kristen Cavallari -- Kardashian says Elisabetta Canalis has this season's most banging body.
"She is in nice shape!" he marvels of the 33-year-old Italian beauty (and George Clooney ex).
DWTS premieres on ABC Monday night at 8 p.m. EST.
And be on the lookout for more exclusive DWTS scoop from Rob Kardashian every Monday at Us Weekly!