A funny video has emerged from the United States of a toddler refusing to let her mum go to the bathroom in peace.

In the video, which was filmed in Denver in January, the mother tries to convince her daughter that she will be out soon and she should wait outside.

The cute little girl just can't take the hint and keeps opening the door to talk to her mum.

My infant was napping so I figured it was my time to escape to the bathroom without an audience or the door wide open. I left my toddler in the living room occupied (so I thought). Moments later I hear her footsteps down the hall. She eagerly joins me. I try to convince her I'll be out shortly but she just won't take the hint. We've always known she was a hoot, now the whole world gets to laugh with us. I often document her "Nelly-isms" on my blog Mrs. Hazley and A Baby! Who knew that we'd end up here, I was just trying to keep out my toddler, now I've invited the planet.