Lady-in-waiting: Kate Middleton as a first-year student at St Salvator's Hall at St Andrews - Prince William reportedly paid £200 her to be his 'slave' in a charity auction She first captivated her prince when she strutted down the catwalk in a sheer dress. Or so the story goes.In reality, Kate Middleton had won Prince William’s affections months earlier when he paid £200 for her during a ‘slave’ auction at a Harry Potter-themed party. 
Student digs: Kate, in a pink top, eats lasagne from a paper plate on her lap The fascinating new insight into the early days of the royal romance comes from a former housemate of the couple, who is releasing a song about her memories of the pair as students. Laura Warshauer lived with the new Duke and Duchess of Cambridge in St Salvator’s Hall during their first year at St Andrews University, and watched them fall in love.Her song – titled To Will and Kate, Meet Me at Exit 109 – paints a picture of a fun-loving couple who joined in with a huge foam fight in the quad, drank wine out of plastic cups from Woolworth’s and sat on the floor to eat lasagne with fellow students. 
Young couple: Prince William and Kate Middleton in snaps from their time at St Andrews Miss Warshauer said: ‘One of my favourite memories was in November of [first] year and we were invited to a Harry Potter party at this castle.‘We all got on a big bus to go there and I remember Kate and William dancing together all night. ‘There was a charity auction where you could bid for the person for the day and Will paid £200 for Kate. She was dressed in school uniform and was stood on these stone steps with us all below.‘No one else was winning Kate that night. They already had that connection.’ 
Kate and Laura Warshaeur as students - Laura lived with the future Duke and Duchess of Cambridge at St Andrews University 
Prince William and Laura Warshauer pose for a photograph during their St Andrews days 
In line to the throne: Kate with friends at her halls of residence source: dailymail
