Currently Being ModeratedNov 19, 2012 11:55 PM (in response to Simone55)
If it's a USB printer, then I would assume that it would work. Go here - http://support.apple.com/kb/HT3669#HP - and see if your printer is listed on the 'official' Apple HP site.
Currently Being ModeratedNov 20, 2012 1:12 PM (in response to clintonfrombirmingham)
It will also help to know your printer model to ensure it is compatible with Mountain Lion.