MGM Springfield announced Thursday that it has chosen Regal Cinemas to operate the movie theater complex that is part of the company’s $960 million resort casino project. MGM Springfield President Michael Mathis announced the selection of Regal during the regular meeting of the Massachusetts Gaming Commission in Boston. Gaming Commission Chairman Steven Crosby congratulated MGM upon announcing the selection. Mathis said MGM Springfield is excited to partner with Regal for its seven-screen theater, as part of its entertainment offerings in Springfield. Regal currently operates nine other theaters across Massachusetts, according to the company’s website.