Dancing dog duo Ashleigh and Pudsey and male choir Only Boys Aloud have become the first two acts to make it through to the final of Britain’s Got Talent 2012.

Ashleigh and Pudsey – who earlier won a standing ovation from the judges and the audience with their 1920s inspired routine – made it straight through to the final after receiving the highest number of public votes.

Only Boys Aloud nabbed the second place after making it into the top three along with boyband The Mend.

However when the judges’ vote to send one of the acts through to the final ended in a tie, the result was decided by public vote – and the choir were revealed as the act who had been the second most popular with viewers.

Both acts will now compete in Saturday’s final for the prize of £500,000 as well as the chance to appear at the Royal Variety Performance.

Earlier in the show Simon Cowell had raved about Ashleigh and Pudsey’s performance, saying, “This is what I have been waiting for all my life. I would love a dog like that, I really would. Can we breed him and I can have the puppy?”

Amanda Holden added, “Pudsey is the cutest dog but you both have personality…a brilliant double act.”

Only Boys Aloud also made a good impression on the judges with their performance of the Welsh hymn Gwahoddiad.

“Who would have thought that singing Welsh hymns could be so powerful?” David Walliams said afterwards, while Alesha Dixon agreed. “I loved it and I appreciated that you stuck to your roots and did something traditional tonight.”

Other acts who took part in Sunday’s semi-final included singer Rachel Knowland, swing band The Jive Aces, dance troupe United We Stand, violinist Analiza Ching, 12-year-old singer Lauren Thalia and rapper Zipparah ‘Mr Zip’ Tafari, who reprised his ‘Where Me Keys Where Me Phone’ song from earlier in the series.

Nine more acts will take to the stage on Monday night including operatic duo Charlotte and Jonathan, teenage singer Paige Turley, dance troupe Karizma Krew and ballroom dancers Kai and Natalia.

The judges also revealed on Sunday’s semi-final that one ‘wild card’ act will join the ten acts who make the final over the next week.