In 2026, Princess Cruises has a "Smart Casual" dress code for most evenings, which allows jeans as long as they are "refined" and in good condition. This means dark-wash, tailored jeans without holes, fraying, or heavy distressing are perfectly acceptable in the main dining rooms and specialty restaurants. You should pair them with a collared shirt or a nice blouse to meet the "Smart" requirement. However, jeans are strictly prohibited on "Formal Nights" (or "Premier Nights"), where the dress code shifts to evening gowns, cocktail dresses, or suits and tuxedos. On these specific nights, if you wish to remain in jeans, you will be directed to the World Fresh Marketplace (buffet) or other casual poolside eateries. Additionally, "Casual" attire like swimwear, tank tops, and baseball caps is never allowed in any dining room for dinner. For the best 2026 experience, think "Country Club Casual"—clean, pressed denim is fine, but if you look like you’re ready for a yard-work session, you’ll likely be asked to change before being seated.