SQL Server 2012 :: Get Results In A Specific Order?

I have a simple example of what I am trying to do. Here is some code to make a quick table to demonstrate:

create table #students
(
lastname varchar(50)
,firstname varchar(50)
,address1 varchar(50)

[Code].....

I want to select all the records, and them them be in alphabetical order first by lastname, then by firstname, then by address. HOWEVER, and this is the tricky part, I want to group names together that have the same address. So, in this example, I want the results to be in this order:

HallC6309 N Olive
HallP6309 N Olive <---- grouped with the C record because they have the same address
HallE5488 W Catalina <---- back to alphabetical by first name
HallJ7222 N Cocopas