In the middle of the 1973 model year, Buick returned to the compact market with the Buick Apollo, using General Motors’ X-body platform, based on the Chevrolet Nova. When the car was extensively restyled for the 1975 model year, the two-door hatchback sedan (coupe) and two-door sedan (coupe) were rechristened “Skylark”, while the four-door sedan remained "Apollo". As this generation Skylark was "downsized", the next larger coupe and sedan to take the market position that the Skylark formerly occupied was the Buick Regal and Buick Century, which were introduced in 1973.