Upon arrival on the photo set, Mc Adams discovered it was a nude session, declined and left.
Mc Adams' break-out role came in 2004, when she starred in the comedy film Mean Girls opposite Lindsay Lohan, Lacey Chabert and Amanda Seyfried, based on Rosalind Wiseman's book Queen Bees and Wannabes.
In 2010, Mc Adams appeared in her first star vehicle, the comedy Morning Glory.
In 2015, her highest profile roles were in the second season of the HBO crime drama True Detective, and as journalist Sacha Pfeiffer in the drama Spotlight.
After a two-year career break, Mc Adams starred in two limited release films in 2008; the film noir Married Life and the road trip comedy-drama The Lucky Ones.
She returned to prominence in 2009 by appearing in the political-thriller State of Play, the science-fiction romantic drama The Time Traveler's Wife and the mystery action-adventure film Sherlock Holmes.