The Greatest Beer Run Ever is a 2022 American biographical war comedy-drama film directed and co-written by Peter Farrelly, based on the book of the same name by John "Chickie" Donohue and Joanna Molloy. The film stars Zac Efron and Russell Crowe, and follows the true story of Donohue, who as a young veteran sneaks into the Vietnam War to deliver some beer to his friends, who are serving their duty.