Dear Uncle [Name],
I hope this letter finds you well. I am writing to express my deepest appreciation for the invitation you have extended to me for your upcoming inaugural lecture. It is an honor to be invited to such a special event, and I am grateful for your kindness in thinking of me.
I am incredibly proud of all that you have achieved thus far in your career as a professor at [University Name]. Your dedication to your research and your commitment to your students is truly inspiring. It is no surprise to me that you have been given this opportunity to deliver an inaugural lecture, and I know that it will be a tremendous success.
Please accept my sincerest congratulations on this achievement. I know that it is the result of years of hard work and dedication, and I am so proud to call you my uncle. I look forward to attending your lecture and hearing all about your latest research.
Thank you again for the invitation, and please know that I am always here to support you in all of your endeavors.
Warm regards,
[Your Name]