"I don't see Villa causing United any problems, even if they do field some of the youngsters." says a typically biased Gary Neville.
Connolly goes for a strong lineup to face United but so does Sir Alex.
Despite resting a few big names, internationals Nani, Javier Hernandez, Nemanja Vidic, Shinji Kagawa and David de Gea start the game.
A late injury to Victor Wanyama forces Fabien Delph in to midfield alongside Karim El Ahmadi.
Villa go behind on 16 thanks to a sublime Nani free-kick.
Villa don't back down and dictate pace before El Ahmadi feeds Bent, who lays of N'Zogbia to curl home an equalizer.
A corner from N'Zogbia is nodded home by Vlaar and Villa lead 2-1 at the break.
Connolly, clearly guarding against any complacency, sends his team out with fire in the belly and just 4 minutes after the re-start, Darren Bent heads home an Ait Fana cross for 3-1.
Villa continue to go for the jugular and Benteke bursts in to the box where he is hauled down by Vidic. Bent steps up and Villa Park erupts, 4-1 to the home side with just over an hour played.
Villa slow the game way down but a momentary lapse from Lowton allows Darren Fletcher to make it 4-2.
With time ticking away, Welbeck makes it 4-3 in the 92nd minute but Villa hold on to advance to the next round.
"It was never a penalty!" Rages Ferguson, who spits his chewing gum in the face of Sky's Guy Mowbray in frustration. Fergie later claims it was an accident and blames Mowbray for the incident. The FA agree and decide not to charge Ferguson as the Sky correspondent shouldn't have asked such a silly question in the first place.
"To be honest, 4-3 flattered them, we battered them all over the park and it could easily have been 7." Retorts the Villa boss.