An ageing hard-living 1970s rock star decides to change his life when he discovers a 40-year-old undelivered letter written to him by John Lennon.
Starring Al Pacino, Annette Bening, Christopher Plummer, Jennifer Garner, Bobby Cannavale, Nick Offerman, Josh Peck, Katarina Čas, Giselle Eisenberg, Melissa Benoist