He started out in the TV series That ’70s Show and as a heartthrob in a string of hugely successful romcoms like No Strings Attached with Natalie Portman. But Ashton Kutcher, born in Iowa, has long since become a powerhouse producer – most notably of Punk’d which aired for nine years and almost 80 episodes – as well as entrepreneur and philanthropist. On his 45th birthday, Raffi Boghosian takes a look at Kutcher’s most successful films.