"As part of Restock Kroger, we are investing in redefining our customers' grocery shopping experience by bringing online and offline seamlessly together," said Yael Cosset, Kroger's chief digital officer. "Having grown our digital sales in 2017 by 90 percent, we continue to accelerate our digital roadmap in 2018 to make shopping with Kroger simpler and more personalized."

"When you look at Kroger's customer coverage area for seamless shopping, two-thirds of our customers – more than 40 million households – have access to curbside pickup and/or delivery," Cosset added. "Our goal is for these convenient services to be available to every customer."

With its expanded partnership, Kroger now offers home delivery in 45 markets through Instacart and other delivery partners representing the following divisions: Atlanta; Central; Cincinnati; Columbus; Dallas; Dillons; Fred Meyer; Fry's; Harris Teeter; Houston; King Soopers; Louisville; Mariano's; Metro Market; Michigan; Mid-Atlantic; Nashville; Pic 'n Save; Ralphs; QFC; and Smith's.

Kroger will continue to expand its “seamless coverage area” and enhance its digital shopping experience to provide customers with quicker and easier access to personalized products, recipes, digital coupons, weekly ads and smart shopping lists. Kroger customer can shop on the company's website or using the app.

"With the expansion of our Instacart partnership, it provides Kroger the opportunity to increase our delivery offerings even further and when you combine it with our successful curbside service, it will help us accelerate our ecommerce reach significantly," Cosset said.

"We are thrilled to work with Kroger and share the same vision of bringing same-day grocery delivery to more American households and cities every day," said Nilam Ganenthiran, Instacart's chief business officer. "When an admired household brand such as Kroger unites with a leading technology platform in Instacart, it is our customers who ultimately win."