It was a big day for the youngest member of the West/Kardashian family, as one-year-old North celebrated the completion of a week's worth of swimming lessons by taking her very first steps.

Kim announced the huge milestone on Instagram with an adorable photo taken by Kanye of the proud mommy and her precocious little girl. 

"Our baby girl finished one week of swimming lessons today then took her 1st steps right when she got out of the pool!!!! Mommy & Daddy are so proud of you!!!! Photo cred: Daddy," Kim captioned the flick.

The spotlight wasn't solely on North, however. The most famous of the Kardashian sisters used the pool day to work on her tan while rocking a very flattering bikini which showcased her glorious curves. 

Check out Kim's sexy bikini shot up top, along with an adorable photo of the proud mother and her adorable little girl.