Olivia Thirlby is an American actress. Her debut film was United 93 (2006). She is best known for her role as Leah in Oscar winning film Juno (2007). Olivia appeared in Snow Angels (2007), The Wackness (2008), Uncertainty (2009) and What Goes Up (2009). She garnered immense appreciation for No Strings Attached (2011), science fiction thriller The Darkest Hour (2011), drama film Being Flynn (2012) and science fiction action film Dredd (2012). Olivia was last seen in Just Before I Go (2014) and has the films The Wedding Ringer and The Stanford Prison Experiment lined up.