Liverpool substitute Dirk Kuyt's late strike earned the Reds a second dramatic cup success at Anfield in the space of a week, with victory over Manchester United in the FA Cup fourth round.
The tie looked destined for a replay at Old Trafford after Ji-Sung Park restored parity with a powerful shot just before half-time following Daniel Agger's headed opener.
United keeper David De Gea was unable to make his presence felt in the company of Andy Carroll, as Steven Gerrard's corner found Agger to take advantage of the Spaniard's uncertainty.
But there was a late twist to a surprisingly flat encounter on Merseyside, as the Dutch striker escaped the attentions of Anfield 'boo-boy' Patrice Evra with just two minutes remaining.
Kuyt latched on to Carroll's flick and fired past De Gea in front of an ecstatic Kop. It capped a perfect four days for Liverpool and manager Kenny Dalglish after reaching the Carling Cup final and their first Wembley appearance since 1996 at the expense of Manchester City.
They have now successfully seen off the Citizens' fierce rivals out of the FA Cup to progress to the last 16.
United have failed to win at Anfield since 2007, and manager Sir Alex Ferguson, who was without the services of Wayne Rooney, was forced to watch his team turn in a tepid performance with no real cutting edge up front.