McAdams' breakout role came when she co-starred in the 2004 teen comedy film Mean Girls opposite Lindsay Lohan, directed by Mark Waters and was based on the book Queen Bees and Wannabes by Rosalind Wiseman.
2005 saw McAdams star in three films. In the comedy Wedding Crashers, McAdams played Claire Cleary, the daughter of an influential politician and a love interest for both Owen Wilson and Bradley Cooper's characters
The talented Rachel McAdams .She ignites my fire. McAdams starred in three films in State of Play, a political thriller based on a BBC television series, co-starred Russell Crowe, Helen Mirren, and Ben Affleck.