Thanks, Shirley. Good afternoon, and thanks for joining us. On our call today, I'll provide an overview of our second quarter results and discuss a few highlights from our two operating segments, system services and clear aligners. John will provide more detail on our Q2 financial performance and comment on our views for the third quarter and 2023 overall. Following that, I'll come back and summarize a few key points, and we'll open the call to questions. Overall, I'm pleased to report another better-than-expected quarter with Q2 revenues and operating margins that exceeded our guidance. Q2 results reflect improving trends across regions, strength in teen and younger patient volumes, driven by momentum in both submitters and utilization as well as continued growth from Invisalign First. In the Teen segment, which represents the largest portion of the 21 million annual orthodontic case starts, 195,000 teens and kids started treatment with Invisalign clear aligners during the second quarter. An increase of 7% sequentially and 10% year-over-year, reflecting the highest annual growth rate in the teen segment since 2021. For Systems & Services, second quarter revenues of $169.5 million were up 10.5% sequentially and down very slightly 1% year-over-year. For Q2, sequential increases in systems and services revenues, reflects increased scanner volumes across the regions and higher services and non-system revenues, reflecting increased sales of certified pre-owned or what we call CPO scanners and higher subscription revenues. On a year-over-year basis, Q2 services revenues increased primarily due to higher subscription revenues from a large number of iTero scanners in the field. We also had higher non-system scanner revenues related to our certified pre-owned again CPOs and our scanner leasing and rental programs. For Q2, total clear aligner revenues of $832.7 million up 5.4% sequentially and 4.3% year-over-year. Q2 sequential revenue growth rate is consistent with our historical three year average and reflects growth across all regions. Q2 non-case revenues at $80 million were up 6.2% sequentially and 18% year-over-year, reflecting continued growth from Vivera retainers and Invisalign Doctor Subscription Program, or DSP, our monthly subscription-based clear aligner program. And Commerce sales for aligner-related consumables, like aligner cases and whitening and cleaning products. DSP has been successful in addressing an important and growing opportunity for experienced Invisalign doctors. It is our first subscription-based clear aligner program that enables doctors to reach new patients and provide them with a better overall experience. DSP enables doctors flexibilities to treat simple touch-up cases or offer their patients a superior, flexible, and convenient retention solution. We introduced DSP in the United States and Canada in 2021. We expanded it to Spain and the Nordic countries in Q2 2023, and we'll launch DSP in France and the United Kingdom in the second half of this year. We have also extended DSP to DSO partners who recognize the value of our Invisalign subscription aligner put model. Over the past two years, our DSP subscription program has continued to ramp and in Q2 drove strong volume growth in touch-up cases typically five to 10 stage cases of aligners. For Q2 '23, we shipped over 18,000 DSP touch-up cases in North America, up from 15,500 in Q1 '23 and more than double the case volume in Q2 '22 last year. Given its continued success and contribution to our growth this year, DSP touch-up cases are included in my overall commentary for clear aligners. Otherwise, specified in my remarks, our case volumes and metrics do not include DSP and touch up cases. For Q2, total clear aligner volumes were up 5% sequentially and up 1% year-over-year. Q2 clear aligner volumes, including DSP touch-up cases, were up 5.4% sequentially and up 2.4% year-over-year. For the Americas, Q2 clear aligner volumes reflect sequential growth across the region from both ortho and GP dentist channels, an increase in teen case starts driven by momentum from Invisalign First and increased adult patients from the GP dentist channel. In North America, adoption of the Invisalign Comprehensive three and three product drove sequential volume growth. For Q2, North American ortho utilization was up sequentially and down a fraction year-over-year, including DSP touch-up cases. Q2 North American ortho utilization was up both sequentially and year-over-year as noted in our Q2 '23 earnings slides. For EMEA, Q2 clear aligner volumes were up sequentially and year-over-year, reflecting growth across the region and continued adoption of Invisalign Moderate, Invisalign Comprehensive three and three products as well as an increase in teen case starts, which grew sequentially and year-over-year driven by Invisalign First and our new Invisalign Teen case packs. On a sequential basis, clear aligner growth was led by Iberia, Italy, DACH, and Turkey. For APAC, Q2 clear aligner volumes were up sequentially and up year-over-year, reflecting improving trends in China as well as other key markets like Japan, Taiwan, Korea and India. Q2 APAC results also reflect increased Invisalign submitters and higher utilization, especially for teen patients, driven by growth from Invisalign First in the orthodontic channel, which is especially important as we enter the China team season in Q3. Q2 APAC results also reflect growth in the GP channel with increased Invisalign submitters and higher utilization sequentially and year-over-year. During Q2, we continued to roll out the Invisalign Comprehensive three and three product in APAC, where it is now available in Hong Kong, Korea, Taiwan, and India. We plan to launch Invisalign three and three in China in Q3. We are also pleased with the additional adoption of three and three product in APAC, where the majority of cases treated are comprehensive, allowing our doctor customers more flexibility within the Invisalign product portfolio. In June, we hosted 2023 Invisalign APAC Summit in Singapore and brought together nearly a 1,000 orthodontists and general practitioners, dentists and clinic staff from 18 countries across the Asia Pacific region. The Summit showcased Invisalign and iTero products, the Align Digital platform and the recent and upcoming innovations, while also highlighting our doctors' experience with digital transformation, and how it improves the patient treatment journey. Attendees joined expert sessions focused on enhancing treatment planning efficiency, optimizing digital workflows, addressing the unique needs of teens and younger patients in exploring the essential aspect shaping today's digitally driven orthodontic practices. Teen orthodontic treatment is the largest segment of the orthodontic market worldwide and represents our largest opportunity for clear aligner sales to Orthos. We continue to focus on gaining share from traditional metal braces through teen-specific sales and marketing programs and product features unique to the Invisalign system. For Q2, total clear aligner cases for teenagers were up 7% sequentially and 9.7% year-over-year, reflecting improving trends across the regions. On a sequential basis, growth was driven by increased submitters in the APAC and EMEA regions on a year-over-year basis. TNK starts were in the APAC region, driven by increased submitters and in the EMEA region, driven by increased submitters and utilization, both in the orthodontic channel. Last year, we introduced the Teen Case Packs in the United States and Canada, and in Q1, Q2, we launched them in France, Scandinavia and Iberia. For the quarter, Teen Case Packs increased sequentially and year-over-year, driven by strength in EMEA. Invisalign First also was up sequentially and year-over-year across all regions and continues to drive adoption of Invisalign treatment among young patients. Invisalign First aligners are designed for Phase 1 treatment, typically in growing children six to 10 years old, making up about 20% of orthodontic case starts. For the dental service organizations, or DSO customers, Q2 clear aligner volumes increased sequentially primarily from the Americas region. Overall, clear aligner growth rate from DSO doctors continues to outpace non-DSO doctors and our DST touch-up cases are ramping nicely up as DSO doctors understand the value of the subscription program brings regarding pricing and flexibility for their patients. Invisalign is one of the most trusted brands in the orthodontic industry globally among both doctors and patients. On the consumer marketing front, we delivered $10.3 billion impressions and had 30.9 million visits to our website in Q2 '23. To increase awareness and educate young adults, parents teams about the benefits of Invisalign brand, we continue to invest in top media platforms such as TikTok, YouTube, Snapchat, Instagram across all markets as well as key social media influencers and brand ambassadors. In the Americas, we focused on reaching young adults as well as teens and their parents through our influencer and creator-centric campaigns partnering with leading smile squad creators, including Marshall Martin, Rally Shaw, and Jeremy Lin. Each of these creators shared their personal experiences with Invisalign treatment and why they chose to transform their smile with Invisalign aligners. Additionally, in the United States, we work closely with athletes over time, a high school sports social media platform that showcases the benefits of Invisalign treatment. Brand interest remained strong throughout the quarter with 9.2 million consumers visiting our websites in the Americas region, representing 17% growth year-on-year. In EMEA region, we partnered with new influencers to reach consumers across social media platforms, including TikTok and Meta. In Germany, we launched new testimonial campaigns highlighting the stories of 70 young adults and teens who share why they chose Invisalign treatment and how it impacted their lives. Our consumer campaigns delivered more than 1.7 billion media impressions and 9.7 million visitors to our website. We continue to invest in consumer advertising across the APAC region, resulting in more than 12 million visitors to our websites and over $4.8 billion impression. We expanded our region in Japan and India via TikTok, Meta and YouTube. We partner with key influencers like [indiscernible]. We saw increased brand interest in consumers as evidenced by 270% year-over-year increase in unique visitors to our website in India and a 46% year-over-year increase in Japan. Adoption of My Invisalign consumer and patient apps continued to increase with 3.1 million downloads to date and over 350,000 monthly active users, a 28% year-over-year growth. Uses of other digital tools also continue to increase. ClinCheck live update was used by 40,000 doctors on more than 580,000 cases, reducing time spent and modifying treatment by 20%. Invisalign practice app is increasing in adoption with 88,000 doctors who are actively using this app and 5.1 million photos were uploaded in Q2 via the Invisalign practice set. With that, I'll turn the call over to John.