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Less than a year after the birth of her daughter, North West, Kim Kardashian is in the best shape of her life, but she’s not done dropping dress sizes just yet.

The reality queen, who is reportedly fitting into a size four again, is apparently obsessed with whittling her waist down even further by the time she walks down the aisle with Kanye West later this year. At least, that's what In Touch is saying.

Kim, who has already lost upwards of fifty pounds since giving birth, has her eyes on the prize: being a size zero when she takes her vows.

Kim wants to be thinner than her pre-baby body and is willing to do anything to get there,” an insider tells In Touch.

The future Mrs. West is getting close to her weight-loss goal through daily workouts starting at the break of dawn and lasting up to three hours.

In addition to her rigorous exercise routine, Kim’s adopted Spartan-like discipline when it comes to her food choices, steering clear of carbs whenever possible.

“[She’s] counting the calories in everything and living on grilled fish, chicken and steamed vegetables,” admits a pal.

While Kim is eager to squeeze into sample sizes for her big day, she’s equally excited about the possibility of her third wedding rocketing her into the ranks of fashion’s top tier. “Kanye’s been talking to Anna Wintour about having the wedding appear in the magazine,” says a friend.

Do you think Kim is going overboard in her quest to be a picture-perfect bride?

Source: In Touch