updated 05/01/2011 AT 12:00 PM ET
•originally published 05/01/2011 AT 1:00 PM ET
They were spotted in the incriminating position Saturday night, outside a White House Correspondents’ Dinner after-party in Washington, D.C.
Johansson – wearing an Elie Saab cocktail dress and newly auburn hair – started the evening off with her brother, Hunter Johansson, in attendance of the annual event before joining up with Penn at the Vanity Fair/Bloomberg bash. They reportedly left together around 2:30 a.m.
In addition to their cozy outings close to home, Johansson and Penn have also been seen together in Mexico.