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Kim Kardashian knows that all eyes will be on every detail of her August 20 wedding to Kris Humphries. Good thing her older sister Kourtney is there to help the 30-year-old bride-to-be with all of those last minute details!

The two sisters, both wearing Christian Louboutins, ran errands in Beverly Hills ... remaining focused on the task at hand. Kourtney wore an ultra short white dress, while Kim opted for black pants and a zig zag-printed sleeveless blouse.

And the wedding planning isn't only for the bride. See groom-to-be Kris Humphries running around town getting ready for his big day ... after the jump.