Olivia Olsen is an American singer and actress. She is probably most know for her role in the British romantic comedy "Love Actually" from 2003 and the song "All I Want for Christmas is You". She was born on the 21st of May 1992. In the movie "Love Actually" she plays Joanna Anderson, the love interest of Sam (Thomas Sangster). At the end of the movie Joanna Anderson/Olivia Olsen sings Mariah Carey's "All I Want for Christmas is You" at a Nativity Concert.