If you were talking to a male, it would be, "Tu est beau'. If you were talking to a female it would be, "Tu est belle". The masculine form of beautiful is 'beau' and the feminine is 'belle'
"Belle femme" is "beautiful woman" in French.
Belle famille is beautiful family in French.
Beautiful skin in French is "Belle Peau" :)
Beautiful photographs in french is de belles photos
Belles personnes is "beautiful people" in French.
'Beautiful view' translates to French as 'belle vue'.
Beautiful all over in French is belle partout.
Beau Rêve = Beautiful Dream
You say, belle cousine.
cloche
belle
Beautiful Goddess in French is Belle Déesse and is pronounced (Bell dee-eh)