Hi, everyone and welcome to our quarterly earnings call. We recently celebrated our seventh anniversary and I wanted to share some highlights of where we are today and how we plan to drive growth and profitability in the future. Through the hard work, dedication and innovation of our team, today, we have one of the largest and most engaged mobile communities in the world. We have grown our community and engagement because we are different. We are the fastest way to visually communicate with close friends and family. We built Snapchat shots from the ground up to empower people to express themselves instantly through our camera, resulting in over 3 billion snaps created every day. We're a fun place to learn about the world on our discover content platform. We have built a premium mobile content experience that complements content created by your friends and we are built for mobile. We believe that mobile devices present unique opportunities like communicating visually and we are excited about the future of innovation on mobile platforms. We have attracted a large and loyal community, because our core visual communication product is built to support people’s close friendships. Over 60% of our daily active users create snaps every day, because they use our service to talk with their close friends and family. Every product we have is built around our core communications product. We have been successful in launching new products and features by expanding the use of our personal communications product into other areas like memories or discover that increase engagement and drive our advertising business. Over the past two years, we have transformed our advertising model to self-service and we are now beginning to see the results. Trailing 12 month revenue has grown over 50% and now exceeds $1 billion, as we continue to scale our business and deliver value to advertisers. I’m incredibly proud of our team and what we have accomplished in such a short time. We're excited about the future and we have just scratched the surface with respect to our long term growth opportunities. As we enter our next phase of growth and scale for the long term, I'm happy to share that two new leaders are joining our team. Jeremi Gorman will be starting mid-November as Chief Business Officer with responsibilities, including global business solutions, online sales and customer operations. She’s spent the last six years in Amazon where she was most recently Head of Global Advertising Sales. Jared Grusd will be starting in early November as Chief Strategy Officer with responsibilities, including partnerships, content and business development. He was most recently CEO of HuffPost and global head of news and information at Oath where he has been for more than three years and previously was General Counsel and Head of Corporate Development at Spotify for four years. Today, we are focusing our time and resources to expand our community, increase engagement and improve monetization. We have a significant opportunity to grow and broaden our global community over the long term, but we have incredible reach among our core demographic of 13 to 34 year olds in the US and Europe. There are billions of people worldwide who do not yet use Snapchat. Continuing to improve our user experience and creating awareness about our value proposition are key drivers in growing our community. This quarter, our daily active users grew 5% over the prior year and were down 1% sequentially. The decline was primarily among Android users. We have been developing a completely new version of our Android application to be lightweight, modular and performance. The Android community represents a global growth opportunity for us and we're making good progress, testing the application in select markets. We look forward to rolling it out when it's ready. In addition to building our community, we are focused on increasing engagement across our products to drive growth. Our community continues to spend more than 30 minutes per day on average on Snapchat and we are working to provide even more value to our Snapchat community. We recently surpassed a major milestone with Snapchatters saving more than 200 billion memories. In Tic-Tac Toe, one of our new Snappables, a shared augmented reality experience with friends, had over 80 million unique users in Q3. Since we launched our redesign earlier this year, there are more people watching premium content than ever before. Our new layout for discover allows us to invest in both the quality and quantity of content available on our platform. Show is continuing to attract more viewers and in Q3, 21 unique shows and discover reached a monthly active audience of over 10 million viewers. On October 10, we announced a new slate of 12 Snap original shows in a wide range of genres. Our content is tailor made for mobile, it's vertical and fast paced in an effort to draw you in quickly with most shows running five minutes or less. A media platform, Discover, allows us the opportunity to increase engagement, expand our content library and increase our premium offerings, all of which should benefit our advertising partners. We continue to improve monetization, as we scale our advertising business and our results demonstrate meaningful progress. Third quarter revenue grew 43% year-over-year and 14% sequentially, driven by traction in our global online sales business, which includes small and medium-sized businesses and sales partners and increased adoption of our self-service platform by performance oriented advertisers. Our growth is being driven by improving ROI, on-boarding additional advertisers and expanding our suite of advertising products and tools. In the third quarter, over 85% of our advertising revenue on Snapchat was transacted via self-service, up from 35% one year ago. The transition to self-service has allowed us to scale our sales efforts to smaller advertisers that we couldn't initially reach, like FabFitFun, a subscription company, which improved their cost for acquisition by 36% this past quarter, utilizing our new conversion optimization tools and subsequently increased their lead generation budget by 7 times. We continue to see opportunities in improving our measurement, relevance and optimization to drive growth. Our first party measurement is helping advertisers quickly understand the return on investment, which helps unlock additional spend. The Snap Pixel continued to see impressive growth with over 230 million purchase events in Q3, up from 70 million in Q2. When we launched Ad Manager a year ago, we had one optimization goal, swipes. Since then, we've added brand objectives, such as video views, consideration objectives, such as website visits and app installs and conversion objectives such as in-app purchases. These additions help increase performance, improve relevance and allow us to start to build an always on business where we consistently deliver ROI for our partners. In Q3, we expanded our ad product offerings to address new customers with the launch of Collection Ads. Collection Ads allow commerce advertisers to showcase up to four products on a standard Snap Ad. Wish, e-bay and guests who are part of the test group saw a significantly higher engagement rates compared to typical Snap Ads. E-bay’s engagement rate, for example, was five times higher with their Collection Ad than their typical Snap Ad. We believe Snapchat represents the best place for brand advertising on mobile, particularly for our young, highly engaged audience. For instance, Wrigley’s starburst use Snapchat to create brand ambassadors for their all pink campaign. The campaign successfully drove an over 3% increase in market penetration, with 91% coming from new buyers. With the recent announcement of 12 Snap original shows, we are increasing inventory for premium commercials, our new six second non-skippable ad format. A variety of brands such as Chick-fil-A, Boost Mobile and major studios like Warner Brothers, Fox and Universal have been using the format and we have been pleased with their initial results. Today, we're delivering meaningful return on investment for businesses of all sizes. Looking ahead, we have significant opportunity to grow the number of active advertisers, increase the average spend for advertiser and increase our inventory. For the past seven years, we have been a leader in visual communication, ephemerality, vertical video, augmented reality, stories and much more. We are in this for the long term and we're just getting started. We offer a uniquely different user experience and we're excited about the many opportunities we have to drive growth. Thank you and I will now turn the call over to Tim.