"Markus is great fun, very witty and amusing," a source told The Express.
"He knows everyone. He’s utterly discreet.
“He and Sara are amazing people for Meghan to have on her team.
"Between them they know everyone in the world of politics and showbusiness on both sides of the Atlantic.
"If Meghan and Harry are looking to become a global brand with their philanthropy, they could not have chosen two better people to guide them."