This sepia-toned photo of three sisters sitting together is clearly an antique, and it's so sweet. It somehow manages to capture the bond between three sisters of three different ages. You can tell just by looking at them who the oldest, youngest, and middle child are.

This beautiful portrait of a mother with her two young daughters is so sweet that it's bound to make you smile. The scene is so familiar: a mom getting work done while her two daughters stay very close by, playing and entertaining each other. (And occasionally getting in the way.)

It's hard to tell how old this image is, but it looks like it's pretty old! I love that these four sisters are adults and all look slightly annoyed to be taking a photo but, at the same time, you can see that they feel comfortable and happy with each other.

There is something so lovely about this photo that depicts three sisters dancing joyfully without a care in the world. With their flower crowns and flowing white dresses, they almost look cherubic together.

You can tell these three women are sisters because of the similarities between them, but you can also tell that they each have their own distinct personalities. I'm obsessed with all three of their outfits and accessories, too.

This seemingly candid shot of two young sisters standing over a beautiful scenic background is lovely. To me, it shows two sisters having a good time, stuck in their imagination, and maybe having some sort of adventure.

These two sisters have to be identical twins, right? They look almost exactly alike, even if one is rocking bangs while the other isn't. The best touch is that they're both wearing the same adorable coat.

These sisters obviously have an age gap going on, but they're clearly still close to each other — look how they're posing! They both look happy and relaxed, and I'd love to know the story behind this sweet photo.

This photo from the 1960s shows two sisters having a great time. It looks like they're posing in a restaurant booth, and I wonder if this was a night of sweet memories for them.

Don't these two look like they're having so much fun together?

Look at these outfits! These adorable sisters might not be the same age, but they're still able to play together and have so much fun. And the coordinating jackets are the best. I feel like every person at home has a photo just like this with their own sibling. Such a sweet capture of a fleeting moment in time.

This lovely photo of two young sisters with their dad is obviously a really sweet memory, even if we don't know the full story behind it. (Although it does look like they're posing near the Washington Monument in D.C.) It's so cute how they have the same jackets on, and how happy the father is.

See, we've been forcing our children to pose together for literal years. These two sisters are wearing the same big white dresses and black boots, and their faces look nearly identical.

OK, these two definitely have to be identical twins. They have the same smiles, the same eyes, the same chins, and even the same eyebrows. The only differences are the slight change in hairstyles and the different sweaters. I wonder if they had that cool twin mind connection, too.

This adorably goofy photo shows that it doesn't matter how old you are, you can still have so much fun with your sisters.

I love how simple and sweet this photo is. It seems candid (although it could be an old-fashioned planned photo), like maybe they were coming home from school together, sharing all their sister secrets.

What's better than enjoying a huge treat with your sister in a beautiful setting? Almost nothing! This photo is fun and sweet, and you can tell there's a cute story behind it. (Maybe at one of the Disney theme parks?)

Look. At. Those. Dresses. Imagine trying to steal one of these out of your sister's closet.

It's so cute when sisters wear matching outfits. This photo shows two young sisters in the same blue pants, delicate tank tops, and brown loafer shoes. They even have the same blue ribbons in their long ponytails. That beachball makes me think they're on vacation, but this could just be a fun afternoon in a park.

I love how these two sisters look so much alike, and yet you can tell that they're probably pretty different from each other. There's something about the style of each sister that just makes it seem like they are opposites.

This has to be an airport right? There are few things better than an adventure with your sister, and I love that someone captured this moment with two sisters in their striped socks.

These two sisters look very close in age, if not the same age, and they also look so happy to be sitting and posing together -— you can't fake those smiles! The vintage haircuts with super short bangs are the best part, along with the smocked dresses.

I couldn't resist putting in this old photo of Queen Elizabeth with her sister, Princess Margaret, standing on either side of Prince Philip. This is an old photo for sure, but you can still see glimpses of who they are today.