Complex sentence: Sara got her first major role as Princess Lily playing opposite Tom Cruise in Ridley Scott's film "Legend", but is best known for her role as Ferris Bueller's girlfriend Sloane Peterson in the 1986 film "Ferris Bueller's Day Off".
Split into simpler sentences: Sara got her first major role as Princess Lily playing opposite Tom Cruise in Ridley Scott's film "Legend". Then came her popular role as Ferris's girlfriend in the 1986 film "Ferris Bueller's Day Off".