British actor Robert Pattinson was given a shock when his sisters duped him into thinking his mother was pregnant as part of an April Fool's Day (01Apr) prank. The Twilight star's two elder siblings teamed up to play a trick on him on 1 April, and he believed them when they announced his mum Clare was expecting a new baby. He says, "I think my sisters kind of always wished I was a little sister. I always wanted a little brother. They told me on my 18th birthday that my mum was pregnant - on April Fool's Day. I went to school just rejoicing and basking in the fact that I could have a mini-me. At 18, I was so convinced - it was the most disappointed I've ever been in my life."