Britain’s Got Talent returns for its seventeenth series on Saturday 20 April with weird and wonderful acts not just from the UK, but all over the world. Judges Simon Cowell, Amanda Holden, Alesha Dixon and Bruno Tonioli are all back to watch an array of talent, give their verdict and decide whether they are deserving of a place in the next round. Last year saw Viggo Venn win - his comedy skit involving high-vis vests saw him sail through each round and perform at the Royal Variety Performance.The first episode will see some tremendous, and some not so tremendous acts take to the stage in the hope of not just impressing the judges, but the live audience too - let's have a look at who we can expect to see on Saturday night.