Sander Jennings took to social media to talk about his sister Jazz and being on her TLC reality TV show, 'I Am Jazz.' So who is Jazz Jennings' brother? Here's everything we know about Sander Jennings.

Jennings’ passion for the Stand with Trans mission is personal — his younger sister is trans advocate Jazz Jennings, who has been in the public spotlight since she was a young child.Her YouTube series ...

Sander Jennings is overcoming his nerves to ask his crush out on a date. In PEOPLE's exclusive sneak peek at Tuesday's episode of I Am Jazz, ...