Ben Haenow won the X Factor final this evening with 57% of the vote, X Factor said, and has been top of the public vote every week since overtaking Andrea Faustini in week four of the competition.
Ladbrooks said his win would cost millions for bookmaking industry as he headed into tonight's final as the odd-on 8/13 favourite.
X Factor 2014 winner Ben Haenow will now release his version of OneRepublic's Something I Need.
He performed the song at the end of the 11th series of the show, and it will now be a strong contender for Christmas number one.
X Factor winner Ben Haenow has spoken of his shock after winning the show's final despite coming in to the night as underdog.
"I don't believe it. I don't believe it. Thank you so much," he said after the result was announced.
"My dream has come true. You can't imagine you are going to get to this point in the competition."
Van driver Ben Haenow has won this year's X Factor after a shock victory over rival Fleur East.
Mel B has returned to the X Factor for tonight's final, after she missed yesterday's programme through illness.
The former Spice Girl was released from hospital after being given the OK by doctors today.
Asked by host Dermot O'Leary if she was feeling better, she reponded: "Yes-ish."
"I really missed being here but thanks to all the doctors and nurses who took care of me and got me here tonight," she said.
She added that she was texting her act, Andrea Faustini, "all night", adding he "did such a good job" despite being voted off last night.
Former Spice Girl Mel B will return as a judge on tonight's X Factor final, the show has confirmed.
Mel B is back on #XFactor tonight. After the hospital discharged her & following medical advice Mel is deemed well enough for the show.
In a statement, the show said it was "delighted to have her back on the panel".
Watch the pair battle it out to be crowned this year's X Factor winner on ITV from 8pm.Read the full story ›
Former favourite Andrea Faustini has left the X Factor tonight.
His departure from the show means Fleur East and Ben Haenow are through to the final.
Tulisa Constostavlos returned to the X Factor stage this evening, as the final got underway.
Former Spice Girl Mel B was forced to withdraw with a mystery illness.
X Factor judge Mel B has been unwell for the past few days and missed rehearsals for the upcoming final on Thursday, the show has revealed.
The former Spice Girl will miss tonight's programme following doctor's advice.
The Mirror reported that she was kept in a private ward overnight after receiving treatment.