"I just can’t believe it!" said Ben as Dermot presented him with his winner's single of One Republic's Something I Need.
Ben Haenow beat Fleur East to be crowned this year's winner
The X Factor final started on Sunday night with a group performance of the 16 live acts from the shows who sang Flashdance's What A Feeling.
Former contestant Olly Murs then took to the stage to perform a duet with American pop sensation, Demi Lovato to sing their new hit single Up.
Ben Haenow was first up to the stage to sing his favourite song of the series, Michael Jackson's, Man In The Mirror.
"Good things happen to good people," praised Louis Walsh before Mel B said that he became "the artist and the super star that he is today... a job well done".
"I wouldn't change a thing about you right now," said Cheryl Fernandez-Versini as Simon Cowell congratulated his artist saying, "I could not be more proud of you, it has been a pleasure to work with you."
Then Fleur East took to the mic to perform her best performance to date, Bruno Mars and Mark Ronson's Uptown Funk.
"Oh my god… I've got to say this, of all the finalists I've had, that was the greatest performance I've ever witnessed," said a shocked Simon.
One Direction then stole the show with a performance of Where Do Broken Hearts Go with the Rolling Stone's Ronnie Wood. "It doesn’t get much better than this," said Niall Horan.
With the tension building in the arena, Ben came to perform the winner's single. "I do truly think that that song was made for you, you gave tonight something that I've wanted from you," said Mel B, deeming his performance "perfect".
"You chased your dream, Wembley is screaming for you," said Cheryl while Ben broke down after 12 years of fighting for this moment. "This is what turning into a star feels like," said his mentor.
"I can't believe that I would ever be in this position," said the singer. "It’s overwhelming". Dermot then played several videos from his family and girlfriend who gave him their support making the star well up with tears again.
In a bid to take the X Factor winner's crown, Fleur East came onto stage to sing the same winning song, giving her twist to the hit single.
"You can really see that you wanted this from the very beginning," said Mel before her mentor said that her transformation into becoming an artist "has made the final the closest it has ever been".
"I’m just so happy," said the singer before she thanked her friends and family for their ongoing support over the years.
Grammy-nominated singer Sam Smith took to the Wembley Arena stage to perform his classic hit Stay With Me, before getting the audience to sing with him.
It all came down to the end of the show, when Dermot announced the results and crowned Ben the winner of X Factor 2014.