Range A1 to lastrow and last column

Hi everyone

Im trying to make a selection from a specific cell untill the last row and last column of the sheet. I have the letter of the last column which is "DS'' but now i want to use this in my range selection.

Sub Example()

LastRow = Cells(Rows.Count, "B").End(xlUp).Row
LastCol = Cells(1, Columns.Count).End(xlToLeft).Column
ColumnLetter = Split(Cells(1, LastCol).Address, "$")(1)

Range("G3:DS" & LastRow).Select


End Sub

Anyone knows the answer?