Kroger announced on Thursday that it was expanding its partnership with e-commerce stalwart Instacart, bringing same-day grocery delivery to 75 additional Kroger markets by late October.

The move will grove Kroger and Instacart's nationwide footprint by 50 percent, making the delivery service available through more than 1,600 stores. 

New markets served by the expansion include Atlanta and Augusta, Georgia; Knoxville, Memphis and Nashville, Tennessee; and Little Rock, Arkansas. 

"We are redefining the customer experience through Restock Kroger by rapidly accelerating our customer coverage area for seamless shopping, giving our shoppers the choice of stores, delivery, curbside pickup or ship to your door," says Matt Thompson, Kroger's digital vice president of ClickList. "We value our Instacart partnership, and the expansion is just one more way Kroger is offering millions of our customers across America the fresh food and groceries they want, when they want them."