Bill Gates finally joins Instagram.

The richest person in the world made his debut on the photo-sharing platform on Friday morning under the username “thisisbillgates” (“billgates” was already taken). His first Instagram post is a slideshow of three photos from Tanzania.

In his words on his instagram page:

Hello from Tanzania, Instagram! I just had a great lunch with some amazing kids at Kicheba Primary School in Muheza and met Upendo Mwingira, a remarkable physician who has dedicated her career to fighting neglected tropical diseases.

Melinda and I have been coming to Tanzania for many years now. I always love seeing how much progress the country has made to improve health and provide opportunity. Plus, the scenery is stunning. Whenever I travel to places like this, I wish others could come along and meet the people I get to meet.

I have no doubt it would leave them as optimistic as I am about progress happening around the world. I’ll be sharing photos from my adventures here on Instagram, and I hope you’ll follow along.

This comes just three weeks after another tech billionaire made his Instagram entrance – Amazon founder and CEO Jeff Bezos. Gates is already on Facebook and he has been on Twitter since June 2009. Gates also has a personal blog where he shares a variety of content, from book recommendations to a 360-degree video of Gates interviewing President Jimmy Carter.