SQL 2012 :: Add Unique Numeric Identifier For Text Field With Same Name?

I have a list of movies that show throughout the year. I would like to assign a unique numeric identifier to each text field.

I have provided some sample data with the output I would like. The Movie_ID in the sample data is just made up, feel free to assign any numeric identifier, preferably of the same length but not a necessity.

create table dbo.Movie_Pre_Fix
(
Report_Monthint,
IDint,
Movie_NameVarchar(50)
);
insert into dbo.Movie_Pre_Fix (Report_Month, ID,Movie_Name)
VALUES
(201406,0721312144,'SAW'),

[code]....