Place single child at bottom of flex container flex-direction colum?

Question

HTML:

<div class="wrapper">
    <div class="child1"></div>
    <div class="child2"></div>
</div>

CSS:

.wrapper {
    height: 100%;
    width: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

I have two child, I want the first to be at center of page and only the second to be at bottom without using position absolute or affecting first child positioning