Thank you, Oksana. Good morning, everyone, and thank you for joining us this morning. I will begin by discussing our first quarter financial highlights in the context of the current business and economic environment. I'll then provide a strategic review of each of our segments and our accomplishments during the quarter. Jeff will review our financial results in more detail and provide some thoughts on the quarters ahead, and then we'll be happy to take your questions. Overall, we are very pleased with our strong financial performance in the quarter, especially in light of the unprecedented catastrophe and activity. We posted net written premium growth of 5.2% and a combined ratio excluding catastrophes that exceeded our original expectations, underscoring our ability to capitalize on market opportunities while prudently managing the complexities of an uncertain environment. In particular, I want to call your attention to three highlights for the first quarter. First, we are very excited about the increasing growth momentum in our businesses. Premium production exceeded our original expectations for the quarter, elevating back to pre-COVID levels, reflecting our strong market position and the effectiveness of our strategy. Our balanced approach to Personal Lines pricing has proven to be effective. And the overall business environment, including rate, remains strong in commercial lines, fueling our robust premium momentum. Importantly, we are well positioned to continue driving profitable growth in all major segments of our business, and we expect to achieve mid-single-digit growth or higher for the remainder of the year. Second, consistent with our pre-announcement, we sustained elevated catastrophe losses of $133 million or 11.5% of net earned premiums, primarily as a result of Winter Storms Uri and Viola in mid-February. These losses were substantially concentrated in Texas across all industry classes due to damage from the record-low temperatures, power outages and paralyzing ice and snow, conditions not seen there for more than a century. Our thoughts are with those who have suffered from these unprecedented events, and we remain committed to providing our customers and agents with the responsive support they deserve. With total industry-wide damage estimates projected to well exceed $10 billion, the week-long freeze in Texas and neighboring states is expected to be the costliest winter weather event in history. The extent of the damage highlights the need for further price increases across the U.S. property insurance market. In addition, we are already seeing momentum for sustained commercial insurance rate increases more broadly, particularly in light of the rising cost of building materials. Third, from an underwriting perspective, our first quarter underlying results showed further evidence of our broad-based profitability that enables us to further penetrate our agent partners. This continued strong performance is a reflection of our differentiated strategy, favorable mix, robust rate increases and the benefit of temporarily lower-than-usual frequency in automobile. At the same time, with the pace of the ongoing reopening of our economy and business activity continuing to pick up, we are keeping a close eye on the reemergence of social inflation, given the uncertainty created by court closings and related delays. Accordingly, we are maintaining prudence in our reserves and loss picks. Moving on to the highlights by business, beginning with Commercial Lines. We are off to a great start in 2021. While we expected to gain some momentum in the first quarter, net written premium growth of 7% surpassed our expectations and was at or above pre-COVID levels. From a macro perspective, we are quite encouraged by the ongoing rebound in leading economic indicators, driven by accelerating vaccine programs, a new infusion of fiscal stimulus and favorable job growth. In addition, 2020 marked a record year for the formation of small businesses, adding to our optimism for the year ahead given the nature of our commercial customer base. Business production trends are also strong as we came out of 2020 with positive exposure changes in Small Commercial and in the first quarter, saw middle market exposures turned positive as the quarter progressed. Moreover, Small Commercial new business is off to an excellent start, with growth surpassed only by last year's record first quarter pace. It's worth noting that approximately 20% of our total Small Commercial new business came from new agents, those appointed over the past three years. We also saw a nice uptick in retention in the quarter, a result of our granular pricing segmentation and our strong agency position. Specialty growth was even more robust, led by specialty property industrial, E&S, marine and management liability, which all delivered double-digit growth rates. All indicators point to continuing positive momentum in this segment, including increases in retention and new business. Across most of our commercial book, we continue to see rate meaningfully exceed loss trends. A range of factors is contributing to our ability to obtain substantial increases in rates. And these factors, which include social inflation, relatively low interest rates, property pressure and weather volatility, are expected to persist. We believe that industry pricing will continue, given that some lines such as Commercial Auto remain in need of rate, while others such as Personal Lines are experiencing some loss pressure. The average rate increase across our core commercial book of business was 6.1% in the first quarter, generally in line with our fourth quarter increases. We are taking a slightly more competitive stance in certain more desirable geographies and business classes, on the strength of our granular pricing segmentation tools combined with our overall strong profitability. Rate within workers' compensation appears to be leveling off, while Commercial Auto was still quite robust at nearly 10%. Rate increases in Specialty were 7.5%, slightly below fourth quarter levels. There is particular variability in our Specialty rate increases in any given quarter, which can be driven by specific renewals at the program or account level as well as profitability improvement actions. Our assessment of the overall specialty rate environment in our markets is unchanged from the fourth quarter. Health care, specialty industrial and private company D&O are seeing the largest rate increases in our book. The robust flow of excess and surplus business supports the health of the overall market environment. And at the same time, it is enabling us to grow our E&S business above original expectations. From a strategic standpoint, we rolled out our new TAP Sales platform for our Illinois and New Jersey business owners' policies accounts in the quarter, and it has received rave reviews from our agents, including the frontline account managers. Similar to Personal Lines, Our TAP Sales platform is poised to play an integral role in driving our success in Commercial Lines. The new platform is significantly more efficient, reducing the time needed to generate a quote by nearly 50%. We've eliminated unnecessary steps, dramatically improved the navigation design and introduced pre-fill capabilities and third-party data to achieve this level of efficiency. The platform introduces significantly more pricing precision and flexibility, expands our small commercial industry class appetite and enables product flexibility as well, such as monoline casualty offerings in our cat-prone territories. Our goal is to significantly improve the overall quoting and binding experience in this very competitive segment, which relies heavily on ease of doing business and CSR engagement. TAP Sales is part of a comprehensive set of investments in a broader innovation road map in Small Commercial, where we also have integrated other digital capabilities such as customer self-service and e-delivery of our policies. In addition to Small Commercial, over the past few years, we have launched the TAP Sales platform for professional liability and management liability coverages and before that, in our Marine line of business. These professional and executive lines coverages can now easily be added to an account via our TAP Sales platform for small-sized risks. This provides us with the ability to seamlessly bring a full suite of coverages to our agents, which we believe to be unique and distinctive in the market. We are very excited about expanding our Small Commercial capabilities. Our new BOP platform will be implemented across our national footprint throughout the year and will round out our complementary lines of business in 2022. As such, our Small Commercial business is poised to deliver considerable growth going forward. At a high level, our goal is to make our independent agent partners more efficient in their transactional yet specialized Small Commercial segment, which generates very strong returns. Historically, the small commercial space has been largely defined by relatively simple risks easily addressed by relatively simple products. But the landscape is rapidly changing, with specialization now often required by industry class, size and geography. A capability that allows for customization and flexibility in an efficient way is critical as the industry becomes increasingly customer centric and digitally enabled. And we believe TAP Sales is one of the components to enable this outcome and position us for even greater success. Similarly, we are generating really strong growth from our Specialty initiatives, including the financial institutions focus in our professional and executive lines unit and cyber offerings. As we see our current specialty portfolio delivering strong growth and profitability, we are continuing to develop an additional pipeline of capabilities that allow us to maintain and build on this success, including expanded classes and capabilities in our Marine business. We believe Specialty will continue to be an area of robust growth and opportunity for us. And these initiatives will further strengthen our ability to provide a distinctive set of products and capabilities that meet the evolving needs of our customers. Turning to Personal Lines. Even in a very competitive market, we delivered strong earnings and net written premium growth of 2.2%. Our top line momentum accelerated meaningfully across the quarter as a result of renewal price adjustments that we signaled in our fourth quarter earnings call. With continuing price competition in Personal Auto, we have been selectively adjusting our rate increases in certain geographic regions to defend our renewals while remaining cautious on new business. That being said, our rate increases were still healthy at 3.1% while we continued to increase our rate of growth in line with our expectations. Our disciplined approach to pricing allows us to retain our profitable renewal business and positions us well to capitalize on new business from some competitors' pricing adjustments as industry rates normalize with the increase in auto claim frequency throughout the year. From a strategic standpoint, our customer-centric focus and the geographic diversification of our Personal Lines business represent significant competitive advantages. Hanover Prestige, our popular full account offering for customers with higher-value homes and autos, continues to gain momentum with strong growth in the quarter. In addition, we continue to expand the reach of our TAP Sales online quote and issuance platform, making it easier for our agents and customers to do business with us. We also introduced coverages for motorcycles and personal cyber across multiple states while making further technology enhancements to our platform. With the strong first quarter behind us and the light at the end of the tunnel shining brighter, we are off to a terrific start to the year. Our performance in the quarter and through the last year reflect the effectiveness of our strategy, the viability of our analytic capabilities as well as our underwriting experience and discipline. Our highly collaborative actuarial, underwriting, marketing and claims teams have helped us to successfully navigate through the challenges and the dynamic conditions of the past year. We believe 2021 will continue to bring both challenges and opportunities as we manage through the economic volatility and settle into a new normal as a country. And we are positioned better than ever to react quickly, pursuing attractive business opportunities while watching for areas of pressure. With broad-based profitability, strong agency support, differentiated products and advanced analytics, we are committed to driving profitable growth across our portfolio, growth that will enable us to continue to invest in our company and deliver increasing value for our shareholders, agents, customers and other stakeholders. With that, I will turn the call over to Jeff.