Align Technology, Inc. Announces Date of Its Third Quarter 2003 Financial Results Conference Call SANTA CLARA, Calif., Sep 25, 2003 /PRNewswire-FirstCall via COMTEX/ -- Align Technology, Inc. (Nasdaq: ALGN), the inventor of Invisalign®, a proprietary method of straightening teeth without wires and brackets, today announced plans to release its third quarter 2003 financial results before the market opens on Thursday, October 23, 2003. The release will be available on the Investor Relations section of the company's web site at www.invisalign.com.

On Thursday, October 23, 2003 at 10:00 a.m. EDT (7:00 a.m. PDT), Thomas M. Prescott, President and Chief Executive Officer, and Eldon M. Bullington, Chief Financial Officer, will host a conference call and web cast to review third quarter 2003 results.

To access the web cast, go to "Conference Calls" in the Investor Relations section of Align Technology's website at http://www.invisalign.com/US/html/corporate/investor_frameset.html . To access the conference call, please dial 415-537-1980 approximately ten minutes prior to the start of the call. If you are unable to listen to the call, an archived web cast will be available beginning approximately one hour after the call's conclusion and will remain available through 5:30 p.m. EDT on October 22, 2004. Additionally, a telephonic replay of the call can be accessed by dialing 800-633-8284 with reservation number 21161382. The replay may be accessed from international locations by dialing 402-977-9140 and using the same reservation number. The telephonic replay will be available through 5:30 p.m. EST on November 6, 2003.

About Align Technology, Inc.

Align Technology designs, manufactures and markets Invisalign, a proprietary method for treating malocclusion, or the misalignment of teeth. Invisalign corrects malocclusion using a series of clear, nearly invisible, removable appliances that gently move teeth to a desired final position. Because it does not rely on the use of metal or ceramic brackets and wires, Invisalign significantly reduces the aesthetic and other limitations associated with braces. Invisalign is appropriate for treating adults and older teens. Align Technology was founded in March 1997 and received FDA clearance to market Invisalign in 1998.

To learn more about Invisalign or to find a certified Invisalign doctor, please visit www.invisalign.com or call 1-800-INVISIBLE.

CONTACT: investor relations, Barbara Domingo of Align Technology, Inc., +1-408-470-1204, or bdomingo@aligntech.com; or press, Shannon Henderson of Ethos Communications, Inc., +1-678-417-1767, or shannon@ethoscommunication.com, for Align Technology, Inc.

SOURCE Align Technology, Inc.

investor relations, Barbara Domingo of Align Technology, Inc., +1-408-470-1204, or bdomingo@aligntech.com; or press, Shannon Henderson of Ethos Communications, Inc., +1-678-417-1767, or shannon@ethoscommunication.com, for Align Technology, Inc.

http://www.invisalign.com