The feature film audition that Savannah attends with Rob Reiner was for the role of 'Young Juli' in the film Flipped (2010). The role went to Morgan Lily.
The audition for Grey's Anatomy (2005) that Savannah attends was for the role of 'Jessica Smithson' in the episode Sweet Surrender (2009). The role went to Mary-Charles Jones. Coincidentally, Jones appears briefly toward the end of the film, describing a recent callback at one of the Oakwood seminars attended by Megan.
The feature film audition that Megan attends was for the role of 'Loose Goosie' in the film Spork (2010). The role went to Oana Gregory.