Is it permissible to lead non-mahrams in prayer?

Salaam Alaykum, as we know, today is the first of Ramadan and I'd like to wish all of you a blessed Ramadan. My question is, I'm now currently living with my aunty/with my cousins, and I have one female cousin, and 2 males making a total of 4 with my aunt included. Now, they want me to pray the evening prayer together, (put in mind, they are my ajnab) and I'm worried that it might be impermissible... So what is the ruling for this? Is this permissible? And if it is, can I lead them as imam? P.s I'd really appreciate if I get an answer quick cause time for iftar is really close