Calculate time in hours and minutes between two dates

 Sounds easy right? I want to calculate the difference in hours and minutes between two dates. A good readable notition for my report. I want a format like this:

00:36:53 OR 02:13:45

This can easy be done using a T-SQL Statement like this:

CONVERT(nvarchar(64), EindDatum-StartDatum, 108) AS Duration

So how does this look like in SQL Server?