Jeopardy! fans spotted a detail about Ken Jennings and his wife, Mindy, as the couple took a trip to Italy.

“Along the Alta Via 1.,” Jennings captioned a photo of him and Mindy on July 6. The couple wore hiking backpacks and smiled for the camera in casual clothes. The Alta Via 1 is a 77-mile high-level public footpath that runs through the eastern Dolomites in Italy.

As the pair posed for the photo, some fans pointed out that Ken and Mindy, who have been married since 2000, resemble each other. “Pretty sure he married his female clone lol,” a fan said.

“They definitely are a matching set!” another replied.

“Could be siblings!” a third said.

“Looking good!” a fan added.

“Ken and Mrs. Ken,” a fan said, adding a red heart emoji to their caption. Others left compliments saying that they were a beautiful couple.

Ken and Mindy share two children — Dylan and Caitlin — together. The Jeopardy! host tends to keep his family life private, but has posted his wife more on social media recently.

While this season of Jeopardy! is airing until July 24, Jennings is done filming for the season, so he is spending his summer traveling around the world.

The host shared more photos of his trip on Instagram. One hour before the photo of him and Mindy, Ken shared a video of an alpaca running around a field, captioning it, “Alpaca got the zoomies!”

He spent the 4th of July in Italy, where a wooden building housed tiny elaborate birdhouses. Jennings also shared landscape photos and a dog on the roof of a house.

The game show host shared that their shoes had gotten wet on a hike. A friend told them to ball up a newspaper and stick it in their shoes to dry them, and it worked. He also shared another hack, where if a hotel room needs a key card to turn on the light and you don’t have a key card, any card will do.

His first photo from the trip was on June 28. Jennings shared a picture of an Italian vending machine that said “Beautiful Italian Technology.” “I’ve found the Sophia Loren of soda machines,” he captioned the post. Loren was an Italian actress who had a 70-year-long career.

It is not clear how long the couple is on vacation for. Keep checking Ken’s Instagram for more Italy pictures.

Do you think Ken and his wife resemble each other? Let us know in the comments.