After being rumored for quite some time, Cadillac has finally officially confirmed a new entry in the compact luxury segment. The vehicle is codenamed ATS and as of right now, the automaker has only revealed the first sketch of the car.This teaser sketch shows off a design language inspired by the CTS sedan, but with different headlamps and a more sporty feel. The small Cadillac will begin production next summer at Lansing Grand River, the same Michigan assembly plant that builds the award-winning midsize Cadillac CTS sedan, coupe, and wagon."The car we codenamed ATS is being developed to be a driver’s car on an all-new Cadillac-specific RWD-AWD architecture," General Motors North America President Mark Reuss said. “We have extensively and exhaustively studied the competitive segment, and we have benchmarked the best. And when this car comes out, that will be readily apparent."The Cadillac ATS Compact Luxury Sedan will be launched in 2012. So far, there has been no mention of the ATS-V version expected sometime in 2013.