They say that couples who spend enough time together start to pick up each other’s habits, quirks, and even speech patterns. But you know what they also start to do? Dress alike. Similarly-dressing couples can range from nicely coordinated pairs to horrifyingly exact copies of each other, and guess what? Celebrities are some of the worst offenders when it comes to this bizarre phenomenon! Check out these 10 celebrity couples and see which ones are nearing twin-like territory.

Jennifer Aniston and Justin Theroux

Jennifer Aniston has been adopting BF Justin Theroux’s emo-punk-biker look recently. Here they are strolling around New York sporting matched layers—along with the exact same pair of aviators. I wonder if they bought both pairs together?

Diane Kruger and Joshua Jackson

Jeans? Check. Blazers? Check. Panama hats? Check. That’s one good-lookin’ couple. Bonus points for the blazers being the same color.

Gwen Stefani and Gavin Rossdale

Actually, these two aren’t so bad. They’re coordinated without being totally matchy-matchy. I suppose when you’re a high-profile couple, a certain level of coordination is probably necessary—when you’re going to be photographed pretty much every time you step out the door, it’s a good idea to make sure you aren’t clashing horribly with each other.

Ashley Tisdale and Scott Speer

Minus Ashley’s puppy dog and handbag, they’re wearing pretty much the exact same outfit. Did they plan it, or was it just an accident? We may never know…

Kristen Stewart and Robert Pattinson

The Twilight sweethearts both took the casual route while traveling in sneakers, sweatshirts, layers, and no-fuss duffle bags. I’m curious about the whole sunglasses-indoors thing, though—are they trying to cleverly disguise themselves? Because I hate to break it to you two lovebirds, but it’s kind of not working.

More matching couples including Katy Perry and Russell Brand up next!