Is it true that married couples start to look alike over time? Yes!

Some people resemble their pets – and even more people look like their spouse..

It’s not just a coincidence, there’s even some scientific data to back it up. In one study participants were asked to match up photographs of random husbands and wives. The longer the couple had been together, the more accurately they were matched.

Researchers say there are a few good explanations as to why we start to resemble our spouses. Similar diets and shared environments are two factors and disposition is a big one. We tend to mimic the moods and facial expressions of someone we’re with a lot. If that person is always frowning, you could end up with matching mad faces. If they’re the happy-go-lucky type, you’ll mirror the marital merriment.

Some happy couples even start out looking alike. Studies have shown that partners who are genetically similar to each other tend to have happier marriages.