Are guests welcome or welcomed?

Excuse me, I'm a bit confused about the proper usage of the words "welcome" and "welcomed" in this context. Could you please clarify for me whether we should say "Are guests welcome?" or "Are guests welcomed?" in terms of inviting and accommodating visitors to an event or a place? I understand that both forms are commonly used, but I'd like to ensure that I'm using the most accurate and appropriate one. Thank you for your help.