Polaris Dawn mission: Who are the astronauts doing the spacewalk?

The SpaceX Polaris Dawn mission successfully conducted a spacewalk with two astronauts tethered to the Crew Dragon spacecraft. Billionaire Jared Isaacman and SpaceX engineer Sarah Gillis became the first non-government individuals to perform such an excursion. The mission includes four crew members, using new spacesuits and a redesigned spacecraft.