Casual & Informal:
* You're beautiful. (Simple and direct)
* You're gorgeous.
* You're stunning.
* You're lovely.
* You're pretty.
* You look beautiful. (Emphasizes the current appearance)
* Wow, you look amazing!
* You're so beautiful! (Adds emphasis)
More Romantic/Intimate:
* You're breathtaking.
* You're radiant.
* You're my beautiful (love/darling/etc.). (Use a term of endearment)
* I think you're beautiful. (Slightly less direct, more thoughtful)
Formal/Polite:
* You look lovely tonight. (Appropriate for a formal event)
Adding Specificity (making it more meaningful):
Instead of just stating beauty, you can focus on specific features or qualities you admire:
* I love your smile.
* Your eyes are so captivating.
* You have such a radiant aura.
* Your dress is beautiful on you. (Focuses on the outfit, but implies beauty)
Ultimately, the best way to say "you are beautiful" is authentically and sincerely. Consider your relationship with the person and choose the phrase that feels most natural and comfortable to you.