First gaol Smith Rowe (109’minutes), and the second goal from Aubameyang (117’minutes) with the support of Lacazette (109’minutes), Tierney (117’minutes) cause Newcastle humiliation.
Emile Smith Rowe broke the deadlock with a precise finish into the bottom corner, with former Arsenal striker Ian Wright describing it as a “calm and composed” strike.
Extra-time goals from Emile Smith Rowe and Pierre-Emerick Aubameyang ensured holders Arsenal beat a stubborn Newcastle in the FA Cup third round.
In-form Smith Rowe had an eventful evening after arriving as a second-half substitute, seeing a red card rightly rescinded before opening the scoring.
Aubameyang tapped in the second after a slick move cut Newcastle open, while Andy Carroll missed two golden chances in normal time, which could have sent Arsenal to a rare third-round exit.
The Gunners, who have won the FA Cup on a record 14 occasions, go into the fourth-round draw having being knocked out in the third round just once in the past 25 years.
But it could have been different had 32-year-old striker Carroll been able to convert his opportunities, particularly the second, which came in the final minute of normal time.
Arsenal would have had little time to recover from that and they had keeper Bernd Leno to thank as he reacted quickly to spread himself to smother Carroll’s shot.
That chance came after former England striker Carroll had been unable to take another chance early in the second half, staying onside but sidefooting wide.
“It can only be defined as an absolute sitter,” former Newcastle and England striker Alan Shearer said afterward.
Instead, it was a player at the other end of his career who took the plaudits. Smith Rowe, with his energy and willingness to carry the ball, has added another dimension to Arsenal’s attacking play in recent weeks.
After an insipid first half, the England youth international was brought on as a 56th-minute substitute by Gunners boss Mikel Arteta and quickly became the game’s central character.
In the dying moments of normal time, he was shown a straight red card by referee Chris Kavanagh for a challenge on Newcastle midfielder Sean Longstaff, only for the official to overturn the decision after watching the incident again on the pitchside monitor.
On being able to stay on the pitch and then precisely fire in the crucial goal, Smith Rowe said: “I was really happy. It was a bit of a relief after the incident before, which definitely wasn’t intentional.
Arsenal boss Mikel Arteta-‘He is playing with a lot of personalities’ – post-match reaction.
“It was very impressive from Emile Smith Rowe because is playing with a lot of personalities, a lot of risks. He is playing in areas where he needs to make things happen and he has got the talent to do it.”
On his team’s recent form: “We want to keep going and win more games. It’s always important to stay in the competitions. We want to fight for this competition again, so today was a big game for us.”
Newcastle boss Steve Bruce-“You have to take your chances when they come along. We had the opportunity in the final few minutes and didn’t grasp it. As a cup tie, it could have gone either way and we rue the missed chances.
“I thought Andy [Carroll] did fantastically well. If he had topped it off by scoring a goal, it would have been good for him. There were a lot of pleasing things. We’ve had a tough run of fixtures but we dust ourselves down and go again.”
Both sides are in Premier League action this coming midweek; Newcastle visits Sheffield United on Tuesday, while Arsenal host Crystal Palace on Thursday.