In 'Blue Moon,' Ethan Hawke and Richard Linklater examine the bittersweet end of an artistic partnership

Ethan Hawke and Richard Linklater have one of the all-time greatest partnerships between an actor and a filmmaker in cinematic history. After meeting in the early 1990s in New York City, where Linklater saw Hawke in a play that co-starred their mutual friend Anthony Rapp, Hawke and Linklater have worked together on the beloved “Before” trilogy, the decade-spanning “Boyhood,” and experimental indie hits such as “Tape” and “Waking Life.” But for their ninth collaboration, which has been a dozen years in the making, Hawke and Linklater have chosen to examine the end of an artistic partnership. “Blue Moon,” directed by Linklater and written by Robert Kaplow, premieres in theaters Friday. It follows 20th-century lyri