On Monday evening, 9 p.m. EST, Musk will take part in the "Ask Me Anything" interview phenomenon, popular with celebrities and high-profile figures who take to Reddit's site to answer questions from its 50 million monthly visitors.
Musk asked his Twitter followers to focus questions on SpaceX's scheduled 6 a.m. Tuesday rocket launch. The California-based spaceflight company is to launch its Falcon 9 rocket carrying a capsule packed with supplies destined for the International Space Station, then attempt to land the rocket onto a platform in the middle of the Atlantic Ocean.
Previous interviews include President Barack Obama, Korean musician PSY and comedian Seth MacFarlane.
Musk's Reddit question-and-answer will take place here.