No, you cannot gamble at any MGM Resorts International property in the United States if you are 18. Under strict Nevada and state-specific gaming laws, the minimum age to gamble or consume alcoholic beverages is 21 years old. This policy is strictly enforced at all MGM-branded casinos, including MGM Grand, Bellagio, and Aria. Furthermore, MGM’s corporate policy typically requires guests to be at least 21 years of age to even reserve a hotel room or check in to their properties. While some tribal casinos in other states or certain offshore destinations allow gambling at 18, the major "Las Vegas style" resorts maintain the 21+ limit to comply with liquor licensing and insurance regulations. If you are under 21, you are generally permitted to walk through the casino floor to reach restaurants or theaters, but you are legally prohibited from standing near the slot machines or table games. Security is extremely vigilant, and attempting to gamble underage can lead to immediate removal from the property and potential legal trespassing charges.