Reference last column in worksheet

Greetings,

I'm trying to dynamically reference the last column using

Columns().Select

. I can't seem to figure out how to convert the column reference from a number to a letter.

Sub RestorePivtTable()
Set ws = ThisWorkbook.Sheets("sheet1")
llc = ws.Cells(2, ws.Columns.count).End(xlToLeft).Column
    Columns("E:" & llc.address & "").Select
    Selection.ClearFormats
End Sub

These other methods have failed as well.

'Columns("1:" & lc.Address & "").Select
    'Columns(1, llc).Select
    'Range(Columns(1), Columns(llc)).Select
    'Columns("E:" & Cells(3, llc).Address & "").Select
    'Range("1:" & Cells(3, lc).Address & "").Select
    'Range(Cells(1, 1).Address, Cells(3, llc).Address).Select
    'Columns("" & llc & ":" & llc & "").Select