Ant and Dec return with a fresh search for the nation's brightest new star, as a wide assortment of contestants, from a hypnotising dog act to a girl with a gravity-defying hula hoop, compete for the chance to win £250,000 and a slot at this year's Royal Variety Performance. There's no change to the judging line-up, with Simon Cowell, David Walliams, Amanda Holden and Alesha Dixon all returning to give their verdicts on the hopefuls in this first audition show.

The annual search for a star continues as more auditionees try to win over Simon Cowell, David Walliams, Amanda Holden and Alesha Dixon with their talents. The acts all have their eyes on the prize of £250,000 and a slot at this year's Royal Variety Performance, but first they must secure a place in the live semi-finals. And with the return of the golden buzzers, the judges, as well as hosts Ant and Dec, each have the power to send one act straight through, regardless of anyone else's opinion.

Ant and Dec present the third audition show, as the judges - Simon Cowell, David Walliams, Amanda Holden and Alesha Dixon - hope to uncover more of the nation's talent. Queuing up to take the stage, acts of all ages and abilities are determined to prove they are worthy of the £250,000 cash prize and a slot at this year's Royal Variety Performance, but while some of them will be deserving, others will undoubtedly hear the dreaded sound of the red buzzers just seconds into their performance.

Ant and Dec host the fourth audition show, as the judges - Simon Cowell, David Walliams, Amanda Holden and Alesha Dixon - give their verdicts on more of the nation's best, and worst, performers. Queuing up to take the stage, acts of all ages and abilities are determined to prove they're worthy of the £250,000 cash prize and a slot at this year's Royal Variety Performance, but while some of them will be deserving, the dream will be over for those whose auditions are cut short by the panel.

Ant and Dec host the latest round of the nationwide talent search. A wide variety of acts, from comedians to contortionists, singers to spoon players, compete to impress judging panel Simon Cowell, Alesha Dixon, Amanda Holden and David Walliams with their unusual skills - with a huge cash prize and a coveted slot at the Royal Variety Performance up for grabs at the end of the series.

Simon Cowell, David Walliams, Amanda Holden and Alesha Dixon preside over proceedings as the hunt for Britain's next star entertainer reaches the sixth round of auditions. Ant and Dec are on hand to introduce the acts, and to congratulate or commiserate with them once the judges have passed their verdict.

The final set of hopefuls audition in front of the judges hoping to impress and gain a place in the next round of the competition.

The first set of semi finalists attempt to impress the judges and viewers at home. After each act has performed the judges give their verdict on what they have seen. Those who manage to impress include Henry Gallagher, Cor Glanaethwy and Becky O'Brien.

Ant and Dec are back with the results from tonight's public vote. Ricky Martin performs live on stage. Ant and Dec reveal that Cor Glanaethwy hav topped the public vote and gained the first place in the final. The judges then have to decide between Henry Gallagher and Entity Allstars and they end up choosing Entity Allstars.

The second set of semi finalists attempt to impress the judges and viewers at home. After each act has performed the judges give their verdict on what they have seen. Those who manage to impress include Jules & Matisse and Revelation Avenue.

Ant and Dec are back with the results from tonight's public vote. Jack Pack performs live on stage. Ant and Dec reveal that Revelation Avenue, Jules & Matisse and Old Men Grooving are in the top three. They then reveal that Jules & Matisse have topped the public vote. The judges are then split in their decision for the second place and it goes back to the public vote. Ant and Dec then reveal that Old Men Grooving have got the most amount of votes and have gained the second available place in the final.

The third set of semi finalists attempt to impress the judges and viewers at home. After each act has performed the judges give their verdict on what they have seen. UDI, Gracie Wickens Sweet, The Kingdom Tenors, IMD Legion and Jamie Raven all manage to impress tonight.

Ant and Dec are back with the results from tonight's public vote. Alesha Dixon performs live on stage. Ant and Dec reveal that UDI, IMD Legion and Jamie Raven are in the top three. They then reveal that Jamie Raven has topped the public vote. The judges are then split in their decision for the second place and it goes back to the public vote. Ant and Dec then reveal that UDI have got the most amount of votes and have gained the second available place in the final.

The fourth set of semi finalists attempt to impress the judges and viewers at home. After each act has performed the judges give their verdict on what they have seen. Marc & Wendy, Issac Waddington and BoyBand manage to impress tonight.

Ant and Dec are back with the results from tonight's public vote. Olly Murs performs live on stage. Ant and Dec reveal that Issac Waddington, The Neales and BoyBand are in the top three. They then reveal that Issac has topped the public vote. The judges then decide to put The Neales through meaning that BoyBand just miss out.

Ant and Dec present the last live semi-final of Britain's Got Talent as the final remaining nine acts compete to win the ultimate prize of 250,000 pounds and a slot on the Royal Variety Performance.

After a tense wait it is time to find out which act automatically goes through to the live grand final. The two runner-up acts will then face the judges who will pick their favourite to go through to join them in the live grand final.

The search for this year's winner reaches its nail-biting climax as the British public crown their champion for 2015. The final 10 acts now go head-to-head as they make one last attempt to capture the public's hearts and votes.