Elon Musk, the world’s richest man, is set to attend President Donald Trump’s first White House Cabinet meeting Wednesday morning, CNN reported. Trump’s press secretary Karoline Leavitt defended Musk’s attendance at the meeting despite the fact he is not an official member of the Cabinet but just a “special government employee.

The billionaire adviser to the president is sitting in on the meeting with the heads of agencies such as the state department and Pentagon.