Though you don’t immediately think of fun and games when imagining the late John F. Kennedy and his wife, Jackie Onassis Kennedy, that may change once you see this adorable behind-the-scenes picture of Ginnifer Goodwin and Rob Lowe.

On the set of Killing Kennedy, the Once Upon a Time star goofed off with co-star Michelle Trachtenberg, posting the above pic of Rob pressing his face against a window and waving as the girls looked “surprised.” Ginnifer captioned the photo, “We weren't allowed to speak to @RobLowe til we had read his autobio,” tagging Michelle and  co-star Will Rothhaar (who stares on in the background), too.

The appropriately black-and-white photo shows Rob’s autobiography, I Only Tell My Friends: An Autobiography, sitting on the windowsill, and their facial expressions make it seem like something shocking is in there. Rob, on the other hand, is just being goofy and ridiculous behind them.

We got a sneak peek at Ginnifer as Jackie O recently, but seeing her in action is even better. They just wrapped the film, so hopefully we’ll see it on National Geographic soon!

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