If you are in the UK and have paid enough NI, then yes if you are a woman. If you are a man you will have to wait until you are 65 (but will get free NI credits in the meantime if you are unemployed).
The age for women is going to go up to 65 - not sure when.
In some circumstances (it is means tested) you can get Pension Credit from age 60. But if you are still working and getting paid more than about �100 per week you would not qualify. The amount differs if you have a spouse or partner.