How to concatenate a string and GETDATE() in MSSQL

I need to insert a string (a comment) which should include a date. What I need is basically the following simple operation:

INSERT INTO [Table_1]
           ([textColumn])
     VALUES
           ('Date: ' + GETDATE())
GO

This however, returns the following error: Conversion failed when converting date and/or time from character string.

Any quick fixes?