Hannah John-Kamen, the antagonistic Ghost of Marvel’s Ant-Man and the Wasp, introduced herself to director Peyton Reed with a letter of recommendation that puts all others to shame: one from none other than revered director Steven Spielberg.

“It said, ‘Dear Peyton,’ ” Reed told the Los Angeles Times. “‘I’m excited you’re doing the movie and I just want to put in the good word for Hannah. I worked with her and she was terrific. Signed, Steven Spielberg.’”

“To have a letter from Steven Spielberg – come on, who says that out loud?” John-Kamen added. “It’s really wonderful, and it’s an honor.” The actress went on to tell how she and Spielberg (with whom she worked on Ready Player One) would sing show tunes and standards between scenes. “He’s got a great voice,” she adds. “I think on-set karaoke should be a thing on every set now.”

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In all fairness to the actress, however, she may not have needed the help. In addition to Ready Player One, Hannah John-Kamen’s credits already included “Black Mirror,” “Game of Thrones,” the big screen “Tomb Raider” reboot earlier this year.

Ant-Man and The Wasp, starring Paul Rudd, Evangeline Lilly, Michael Douglas, Michelle Pfeiffer, Michael Peña, Laurence Fishburne and Hannah John-Kamen, is now playing nationwide.