Thanks Kelsey. And thanks to all of you for joining us on the call. As Kelsey mentioned, our shareholder letter is posted to our Investor Relations website, and I encourage you to review it. I'll start this afternoon by sharing financial highlights of the quarter. Then I'll discuss a few business updates. And finally, I will turn the call over to Mario to discuss our financial results and guidance. Net sales for the quarter grew 40% year-over-year to $1.23 billion, reflecting the strength of our business model as active customers grew 33% year-over-year to 12.7 million. Net sales per active customer grew 11% to $360 and autoship customer sales as a percent of net sales reached 70.4%. The highest spending among existing customers and strong autoship sales are a result of growth in assortment across new and existing verticals, including more than 25% year-over-year expansion in SKUs, improved site merchandising and continuous innovation around the customer experience. Gross margin for Q3 was 23.7%, up 410 basis points year-over-year. Finally, our adjusted EBITDA margin of negative 2.5% improved 530 basis points versus Q3, 2018 as a result of the growth and margin expansion across the businesses, as well as scaling of our marketing spend as a percentage of net sales. Chewy's mission is to be the most trusted and convenient online destination for pet parents everywhere. We believe we are positively transforming the industry with a superior value proposition that keeps our customers at the center of everything we do. From our high-touch customer service, to our broad assortment of brands, to delivering on the core tenets of e-commerce of speed and convenience. We're maniacally focused on providing a truly unique and personalized shopping experience that builds trust, brand loyalty and drives repeat purchasing. Our team is executing well against our mission and the business continues to demonstrate strong forward momentum. We believe that there is significant market opportunity ahead of us and remain focused on our strategy of sustainable top-line growth at scale and margin expansion. Recent investments in both private brands and chewy pharmacy, two pillars of our growth and margin strategy, contributed positively to both our year-over-year increase in net sales and gross margin expansion in the quarter. I will now provide some color on both of these important strategic verticals. Chewy private brands remain an important part of our proposition to delight customers with high-quality products. Over the past year, we have grown our Chewy private brands assortment by over 80%, a significant portion of which was in higher margin hardgoods products. As part of this process, we work backwards from customer needs and bring high-quality exceptional customer rated products to life. For example, our Frisco branded beds, dog apparel, and waste management products enjoy an average of 4.5 out of 5 stars, or higher rating and over 90% customer repeat purchase recommendations. As a result of high-quality assortment growth and continued focus on smart site merchandising, Chewy private brands sales grew more than 60% year-over-year in our third quarter or 1.5x our overall net sales growth. These private brands now enjoy double-digit share of sales at Chewy in several growing subcategories such as Frozen Foods, jerky treats and natural bones and chews. Similarly, in hardgoods Frisco potty pads, poop bags, apparel and leashes have reached over 30% of sales in their specific subcategories. Our private brands portfolio has the potential to contribute meaningfully over time and is yet another proof point against our strategy of delivering growth and incremental profitability. Chewy Pharmacy continued its rapid expansion as the fastest growing vertical in the company and continues to receive favorable reviews from our customers who love our overall value proposition in this space and then evangelize to their network of friends and family. We believe that we are playing an important role in pet health and wellness. In addition to driving growth in this vertical, we are focused on building a structurally profitable and enduring franchise. Gross margin for the pharmacy business improved more than 650 basis points year-over-year in Q3 driven by a mix of existing customers converting to pharmacy, MAP pricing discipline, as well as improved logistics as we ramp our Phoenix operations to service West Coast customers. Additionally, we continue to work on products and process improvement behind the scenes to raise the productivity and efficiency of our pharmacy operations. As a result of these efforts, pharmacies fulfillment and customer service costs improved by over 1000 basis point year-over-year, and the business reached profitability at the order level. On the product side, an increasing number of our pharmacy customers continue to use our My Pet Prescriptions product, which helps them better manage information and accessibility of their pet's prescriptions and easily order prescription refills, therefore driving up engagement with our platforms. These data points continue to lend confidence that our service and overall value proposition is resonating with customers and that we are making progress towards our mission of becoming the destination for food, supplies, and medication for pet parents Overall for Chewy, we ended the third quarter with 12.7 million active customers, an increase of 3.1 million customers versus Q3, 2018 and 2.1 million versus the end of fiscal year 2018. Customer retention rates continued to be stable and we are pleased that initiatives such as increased assortment, improvements in site merchandising and maturation in both pharmacy and private brands are contributing to ongoing expansion in lifetime value and an equal or faster payback periods that proves out the efficacy of investments in new customer acquisition. We believe we can further drive growth and profitability through innovation and technology that makes the process of finding and buying the right products easy, convenient and enjoyable. Our Pet Profiles feature has begun to provide us valuable insights into our customers and their pets. We now have more than 5 million Pet Profiles which enable us to provide pet parents with a more personalized experience that helps them discover new products, including treats and toys that are breed and age appropriate. In addition, we recently upgraded our core shopping checkout experience by launching digital payment products, starting with PayPal, which is a recognized as the leading name in payments, as a payment option across our all of our shopping platforms. This represents another step in our journey of providing current and future customers with easy-to-use and broadly accepted payment options. Foundational to Chewy's success and leadership in our industry is our customer-centric culture fueled by the common purpose of our team members. United by our love for pets, we are building a great place to work for the more than 12,000 Chewtopians located at corporate offices, customer service centers and fulfillment centers across the country. Growing our Boston team has been a strategic priority that has allowed us to tap into one of the leading US markets for top talent. Today, our Boston co-headquarter is home to over 325 Chewtopians. Recently, we were publicly recognized as an employer of choice in Boston. We are proud of this recognition, as it represents our commitment to building a great place to work, a strong culture, and an engaged workplace community. As a city that is recognized as a hub for tech innovation, we look forward to further developing our Boston headquarters and deepening our presence in the community. From our dual headquarters to our pharmacy sites and our customer service and fulfillment centers throughout the US, we have put in place an experienced team that is focused on providing a high-bar customer experience, delivering a unique customer value proposition, and driving outsized value for our shareholders. Before I turn the call over to Mario, I'd like to take a few minutes to talk about our Q4 holiday season. These annual celebrations allow us to tap into that unique bond between pet parents and their furry family members delivering more joy to everyone. This year we launched a fully coordinated Holiday Shop which provides a broad yet personalized selection of holiday products for every type of pet and pet parent. The holidays provide us an opportunity to expand our assortment and category depth in our most popular seasonal categories of holiday toys, treats, costumes and apparel, and particularly in hardgoods and our private brands. For example, this year we launched seasonal toys and dog beds as part of our private label brand, Frisco, and have already seen a positive customer response to these newly launched categories. To further support our holistic assortment, we implemented an integrated marketing approach to amplify visibility of our holiday shop through a combination of smart and well thought out social media, email, on-site, and digital tactics. Last but not least, we also enhanced our recommendation engine, leveraging our vast amount of data to make better and more targeted product suggestions. This strategy, which we designed to be even more deliberate this year given the shorter holiday calendar, has been well received by our new and existing customers. We are thrilled that Black Friday and Cyber Monday were record setting days, with Cyber Monday being the single biggest shopping day in our company's history. Overall, we are pleased with our Q3 results and the underlying strength of our business. We continue to deliver market-leading growth at scale driven by our commitment to our customers and informed by a long-range mindset that allows us to make decisions and investments which maximize value. We look forward to a busy holiday season and a strong finish to the year. Now I will turn the call over to Mario who will provide a more detailed review of our Q3 results and walk you through our financial outlook. Mario?