Gregory Evans has been Hockney‘s close companion over several decades and has a deep knowledge of his work. With the artist, he established and continues to manage David Hockney Studio, which oversees the artist‘s work and archives. Since their first meeting in Los Angeles in 1971, Evans has been a frequent sitter and model for Hockney. Their easy relationship and Evans‘s considerable experience of sitting for Hockney make his portrait one of the most relaxed of the group. [http://arthistorynewsreport.blogspot.nl/2017/11/david-hockney-82-portraits-and-1-still.html]