In 2011, Britton adopted a son named Eyob.
In film, Britton starred in the romantic comedy-drama Seeking a Friend for the End of the World 2012 , the romantic comedy The To Do List 2013 , the comedy-drama This Is Where I Leave You 2014 , the drama Me and Earl and the Dying Girl 2015 , the action comedy American Ultra 2015 , the period drama Professor Marston and the Wonder Women 2017 , and the comedy-drama The Land of Steady Habits 2018.
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