Two neighboring 19th-century townhouses in Manhattan’s East Village, both with ties to former child actress Mary-Kate Olsen and French banker Olivier Sarkozy, hit the market on Tuesday, according to StreetEasy listing updates.

One, at 123 E. 10th St., listed with Jonathan Hettinger after Mark Amadei of Sotheby’s International Realty for $7.69 million. The other, 125 E. 10th St., hit the market for $8.3 million and is represented by Jason Haber of Warburg Realty.

But, according to the Warburg listing, both can be sold together for $15.99 million.

“123 E. 10th St. was built at the same time as [125 E. 10th St.] and they share one of the largest private gardens in Manhattan,” the Warburg listing adds.

Sarkozy, the half-brother of former French President Nicolas Sarkozy, purchased the 4,200-square-foot 123 E. 10th St. in 2012 for $6.25 million, records show, and sold it for $6.4 million in 2014.

However, he and Olsen never moved in. Instead, between 2012 and 2014, the pair rented the 4,200-square-foot property at 125 E. 10th St. And despite the fact they were tenants, they still reportedly made renovations to the kitchen and bathrooms.

In 2014, Sarkozy and Olsen bought and moved into another townhouse, at 228 E. 49th St. in Turtle Bay, for $13.5 million — which they still own.

The renovated spread at 123 E. 10th St., owned by artist Aaron Young and wife, French-born CEO of The Webster Laure Heriard Dubreuil, features an eat-in kitchen, a parlor with moldings and carved fireplaces, and a full-floor master suite. It stands five stories.

Next door, 125 E. 10th St. is configured as a five-bedroom residence. Its original fireplaces, mantels and moldings are still intact. It, too, is five stories high.

Haber declined to comment for this story. A spokesperson for Sotheby’s didn’t respond to The Post’s request for further details.