The former newspaper editor called the Material Girl "an irritant in my life for 20 years" and vetoed her from his CNN show when he took the reins from Larry King in January last year (11).
He conceded an apology may win her an appearance, but "other than that, it's a lifetime ban".
The feud was re-ignited on Twitter.com when Madonna joined the microblogging site earlier this month (Mar12), and when Morgan reminded her of the ban, the singer's manager Guy Oseary attempted to embarrass the British journalist by revealing members of his production team had sent an invitation to Madonna to appear on his British TV show Piers Morgan's Life Stories.
Oseary even posted a copy of the email on his Twitter page - but Morgan remained defiant and has now extended the ban.
He responded, "Madonna has only been banned from my CNN show, not my U.K. show, which sent that invite. But I'm now banning her from that too... Oh, and I'm afraid you're banned from all my shows too... guilt by association, sorry."