Is this sentence correct with the plural?
I'm trying to tell a Spanish girl that she and my friend look pretty in a picture they sent me.
Tú y Núria son muy guapas!
Is 'guapas' correct? I thought so, because I'm talking about two people but I wasn't sure.
4 Answers
Yes, it's correct. It's the same as to say: Uds. son guapas.
If you're on tu- terms with the girls, as it appears, I would say '¡ Soís guapas!

Along the same lines as Kiwaino if u wanted to say that the girls looked pretty in that particular picture you wd use estar over ser. Estan muy bonitas/lindas etc. If u were just saying that they are beautiful girls full stop then ser would be the way to go ![]()
"Son muy guapas" works but you're saying "You & Núria are pretty". If you want to say they "look" pretty, specifically in that photo, I would say:
"¡Se ven muy guapas!" (hermosas, lindas, bonitas... whatever is more common where you are for what you're trying to communicate.)