Forwarding IVR calls to outside number

for example I need to setup my ivr as explained

press 1 for joe

1 goes to cell phone A

press 2 for mary

2 goes to cell phone B

How would I go about doing this ?

Create a ring group for each cell phone number (dont forget the # sign after entering the cell phone number) and in the IVR, send each option to the appropriate ring group