Can I use my UK driving licence in the US?

I am currently applying for some internships in america and am hopefully going to be able to hire a car when out there. I am 21 therefore age is not a problem but I only passed my UK driving test last week. Does anyone know if I will have to apply for some kind of international licence or will my full UK licence be enough or will i not even be able to drive only having my licence for such as short time? If the latter is the case, how long do I need to have held my UK licence for before I can drive overseas?

I dont want to get out there to find I should have applied for some other kind of paperwork.