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In page Dean Martin:

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In 1972, Martin filed for divorce from his second wife, Jeanne. A week later, his business partnership with the Riviera hotel in Las Vegas dissolved amid reports of the casino's refusal to agree to Martin's request to perform only once a night. Martin joined the MGM Grand Hotel and Casino, where he was the featured performer on the hotel's opening night of December 23, 1973, and Martin's contract required him to star in a film (Mr. Ricco) for Metro-Goldwyn-Mayer studios.[citation needed]