<Li> Emma Roberts as Casey Mathis / Miller , a 20 - year - old runaway from neglectful parents , and thief , hired by David to pose as his teenage daughter . </Li>
<Li> Emma Roberts as Casey Mathis / Miller , a 20 - year - old runaway from neglectful parents , and thief , hired by David to pose as his teenage daughter . </Li>
who is the girl in we 're the millers
who is the girl in we 're the millers
Emma Roberts
Emma Roberts