Thank you, Jackie, and thank you, everyone, for joining us today. The completion of the recapitalization transaction in the first quarter, whilst the process to a close, substantially eliminated in our outstanding debt and providing us with the financial flexibility to invest in next generation products. And we are doing just that, comScore's capitalizing on the opportunity to help the media business both the traditional and the new direct-to-consumer platforms to more effectively use comScore service to run their business, acquire new customers and to sell their advertising. We believe that we have the best information needed to jump to a forefront of video measurement in the industry in digital and television and moving measurement. Because our core services are census based not on a small sample that lacks stability. Our results are stable, predictable and reliable. In comScore's approach to cross platform measurement, we leverage intelligence from various data collection techniques, including our digital census, our set-top box devices, our smart TV data and our panels. Each of these sources provide different information about content consumption and advertising exposure. Our measurement philosophy is always to bring the best available information to bear on each process within our overall measurement solutions. Our expertise in processing these inputs coupled with our IT, we arrive at a de-duplicated audience measurement across the sources. This is foundational to our product strategy and in my opinion it's the best approach to measurement. Additionally, we are taking action to enter new markets that I'll be sharing with you on future calls. We are also recapturing customers given our substantially more advanced, privacy-focused solutions. And we are posed to take market share in areas that we provide a stronger service versus others. We also look at our valuation of some of our competitors. We believe that our potential to deliver improvements in both our revenue and our bottom line has not been fully appreciated and in fact expect. We expect that to change during the course of 2021 and beyond. Given that backdrop, we are focused and excited about our ability to grow revenues and further accelerate the adoption of comScore as we come out of the pandemic. The renewal and expansion of our ViacomCBS agreement with comScore, as a currency, best demonstrates the marketplace appetite for currency, diversification and advertising sales. We have a lot to be excited for in 2021. In many areas our business is beginning to see improvements, while movies continue to be impacted by the pandemic in the first quarter. We are optimistic that we'll begin to see recovery as soon as the coming quarter. Our local and national television business continues to perform well. We continue to gain momentum with advertising agencies who are increasingly embracing our advanced audience metrics and rallying around our TV currency because of our innovation, stability and precision as well as the inclusion of Comcast, de-identified set-top box data. Our expanded data rights with Charter and our expanded rights with connected TVs. We continue to focus on improving our digital offerings. Much of the decrease in our digital business is from non-US customers but we expect our US-based customers, primarily our large enterprise and mid-market clients to offset the decline as the year progresses. Additionally, as I mentioned earlier, we are making enhancements to this suite of products both from a speed and data perspective that should result in new customers as well as the return of previous customers later this year. We also received video view ability accreditation from the Media Rating Council, also known as the MRC. For integrated third party measurement on Facebook and Instagram which should benefit our digital product suite. Turning to our first quarter financial results, we continue to be encouraged by many products that experienced solid growth year-over-year while at the same time reducing many operating expenses. In the long-term, we believe our investments in data inputs and the new commercial relationships that we have signed will generate increased adjusted EBITDA from a higher revenue and expanded margins, Greg will cover the first quarter results in detail later in the call. On the national television front, we are excited about new opportunities presented by the addition of Comcast, de-identified set-top box data. We expanded the number of highly targeted networks in our national service and these additions that prove valuable, as we signed two new networks deals this quarter. This product advancement along with others is given the confidence the ViacomCBS do use comScore's as a currency because of our stability and detail on the viewer. I believe this move will help influence more media companies to do the same, as we help them grow their business Our efforts to expand our connected television measurement footprint are starting to bear fruit. We are squarely positioned to take advantage of the opportunity that the connected TV marketplace presents. We expect to expand in additional markets in the second quarter that should increase revenue on the back half of 2021. CTV information or connected TV is very important, but it is the combination of CTV information integrated with our full senses media footprint, that includes linear, TV digital, over-the-top, video on demand addressable and other media that contains the real power of unduplicated reach and frequency for planning and for buying. This is where comScore's in a unique position because of our close-close relationship with the MVPDs. We saw a double-digit year-over-year increase in the first quarter in our activation products and we're excited about our connected TV contextual advertising solutions for both, on-demand and live-streaming. We also again continue to gain in our predictive audience suites globally. Our industry-leading cookie less audience-targeting solution is available for desktop, mobile and CTV. This global expansion includes new partnerships in Europe and Latin America with Adsware for their European location-based targets, as well is retarget leg for their Latin American audience. With all of these new and exciting products and our partnerships, activation revenue should continue its fast growing trend and even pick up momentum as the year moves along. We are also focused on the expansion in new areas of measurement to increase our revenue and bottom line in 2021. In the first quarter, we partnered with the Outdoor Advertising Association of America and the Digital Place-based Advertising Association, also known as the DPAA to measure out of home media, which is a natural extension of our impression based currencies. We are the trusted source for superior audience insight across linear TV, OTT, desktop, mobile, cinema and now bringing the same measurement precision to bear on outdoor and digital out-of-home at a time that America is starting to get out of their homes again. We signed our first client Lightbox and we expect to sign more in the near future, which we believe will continue to contribute to revenue in the second half of 2021, as we ramp up the services. We have announced and recently signed an important partnership with Dish Media Sling, and has signed another cornerstone agreement that we're announcing on this call, an aggregator of credit and debit card transactions that we believe will begin to generate revenue during 2021 and will help our customers prove that their advertising is working. On Dish and Sling, the agreement includes the continued cross-platform measurement of advanced advertising and content via comps for TV products. The expanded data rates including first party matching rights to improve accuracy of campaign results and national addressability measurement for programming networks. Lastly in movies, while the first quarter, show of with lower revenue we expect to see a rebound shortly, now that US theaters are beginning to reopen at scale and with countries such as the UK, Ireland and France expected to be reopened in the next couple of weeks. We also continue to see encouraging signs in areas that are open. In early April, for example, Godzilla vs. Kong posted the highest box office sales since the pandemic started, while the film was also released direct-to-consumer at the same time. We expect to benefit as both increased theater openings and new content bring people back to theaters. As I see it, this theatrical industry is now firmly positioning itself in a recovery mode as is our revenue. In addition to the ongoing recovery, we continue to make good progress this quarter and bringing next-generation measurement products to the movie industry. We are now demonstrating our new delivery system to our customers and we expect to realize the benefits in later 2021 from our ability to combine information and analytics in one place, where ever consumers see some movie, whether it's at home or in a physical out of home theater. Finally, I'd like to note some recent success we've had with our customer renewals and our wins across our product suite. In the first quarter, in digital syndication product, we signed new agreements with a number of customers. In national TV, we have new agreements with the Filipino Channel like wise Lightquest's Victory Channel at secured long-term renewals with NBCUniversal and Viacom CBS. In local new agreements, we signed with Sun Broadcasting, Fork Monitors Broadcasting and others and renewed agreements with the Television Advertising Bureau, CoxReps, Katz Television, KDOC in Los Angeles, Quincy media, Sagamore Hill Broadcasting and Independence television. In summary, we made strong progress in all areas of our business in the first quarter. We now have the financial flexibility to invest in future growth products and are moving quickly to bring to market products that should increase our revenue in 2021. Now, I'd like to turn the call over to our Chief Financial Officer, Greg Fink. Greg, please.