A baby taking his or her first steps is one of the hallmark moments of being a parent, and tonight, Kim Kardashian and Kanye West have every reason to smile.

In a photo posted to Instagram, proud mother Kim Kardashian revealed that daughter North West took her very first steps tonight! Kanye snapped a photo of Kim giving North a kiss, who was wrapped in a towel after her swimming lesson.

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

Baby North celebrated her first birthday last month, and so it's been a particularly busy time as parents for Kim and Kanye.

Meanwhile, we can't wait to hear what North's first word will be. Will it be 'momma'? 'Dadda'? Something else? We'll have to wait and see which celebrity parent will win that one!