How to print GETDATE() in SQL Server with milliseconds in time?

Question

I want to print GETDATE() in SQL Server 2008, I need the time with milliseconds (this is for debugging purpose - to find sp\'s execution time )

I find this Difference

Answer 1

these 2 are the same:

Print CAST(GETDATE() as Datetime2 (3) )
PRINT (CONVERT( VARCHAR(24), GETDATE(), 121))