Bluth formed Sullivan Bluth Studios with backing from businessman Morris Sullivan , while film director Steven Spielberg —a long-time animation fan who was interested in producing theatrical animation—helped Bluth to produce 1986's An American Tail . The film was a hit, grossing $47,483,002 ($104 million in today's dollars).  During its production, the studio relocated to Ireland, taking advantage of government tax breaks for film production. Bluth's 1988 follow-up The Land Before Time was a slightly bigger hit, grossing $48,092,846 ($ million in today's dollars)  and spawning 12 sequels and a TV series . Neither Bluth nor Spielberg were involved with any of the Land Before Time sequels; Spielberg produced the 1991 sequel An American Tail: Fievel Goes West without Bluth.