The Hungarian act, who reduced the judges to tears at their first audition, are being backed at 2/1 by Paddy Power to claim the £250,000 prize.
At their first audition they told a love story through shadow theatre, and Amanda Holden claimed that she was so choked up by the routine that she couldn't speak.
Simon Cowell told them: "I'm always very flattered when people from other countries want to compete on this show, and it is one of the best acts I've ever seen in terms of originality and it was very touching."
Watch Attraction's audition below:
Attraction's first audition has already been watched over 16 million times on YouTube.
Other acts that are fancied to progress in next week's live semi-finals include acapella group Band of Voices (4/1), focal encephalitis sufferer and singer Aliki Chrysochou (8/1) and comedian Jack Carroll (10/1).
All three acts won four 'yes' votes from David Walliams, Simon Cowell, Amanda Holden and Alesha Dixon at their first auditions.
Watch Band of Voices' first audition below:
Buskers Luminites (11/1), singer Alex Keirl (11/1) and Voice UK reject Alice Fredenham (16/1) are also fancied to do well.
Rival impressionists Francine Lewis and Philip Green have got the same odds of 25/1 to become the first comedy act to win the series.
The 45 acts competing in the Got Talent semi-finals will be revealed on this Sunday's final auditions show (May 26), which airs at 8pm on ITV.
Got Talent's latest auditions - in pictures: