Currently Being ModeratedJan 29, 2013 9:11 AM (in response to Lizzymac)
Is your printer listed on this page as supporting AirPrint : http://support.apple.com/kb/HT4356 ?
If it doesn't support AirPrint then you could see if the printer manufacturer has their own app in the store which supports it (e.g. Epson have an iPrint app, and HP have an ePrint app). If not then there are third-party printer apps such as Print n Share and PrintCentral Pro which might work with it