Margo Mars: Margo Mars. Producer: Jellywolf. Margo Mars is the Dutch founder of Lief, a London-based creative content studio and one of the UK's most respected and well-known producers. With Lief she has a proven track record for cultivating innovative and imaginative approaches to working, nurturing the careers of its exceptional and uniquely diverse filmmakers. Founded in 2017, Lief has expanded with offices in Paris, Amsterdam and Marseille, bringing a curation of...