The BBC has posted a press release about David Tennant and Billie Piper lighting the Cardiff Christmas lights this year. "The switching-on of Cardiff's Christmas lights at the Civic Centre promises to be an event to remember this year, with a special appearance by two extraordinary intergalactic time-travellers. On Thursday 17 November, the capital is going to have its very own Christmas Invasion as David Tennant and award-winning actress Billie Piper – stars of BBC Wales' hit drama Doctor Who - materialize from their busy filming schedule in Wales to inject a huge dose of Christmas spirit into Cardiff. The free event is staged and managed by Cardiff Council in partnership with BBC Wales, City Centre Management and Red Dragon FM. The entertainment starts at 5.45pm when the Red Hot Santas take to the stage to play some Christmas favourites; and the big switch-on will take place at 6.45pm. Visitors can then move into the city centre for late night shopping until 8.00pm or get their skates on and take to the ice when the open-air ice rink at Cardiff's Winter Wonderland opens its doors to the public at 7.45pm. Billie Piper says: "I'm really looking forward to kick-starting the Christmas spirit in Cardiff. We filmed a lot of scenes for the Christmas episode, The Christmas Invasion, in the city centre and I can't wait to see it lit up for real. I hope everyone has a fantastic time.' Cllr Nigel Howells, Executive Member for Sport, Leisure and Culture, says: "We are delighted to work with BBC Wales and I know that Cardiff will welcome Billie and David to the Christmas Lights Switch On. It should be a great night for the family and a wonderful start to Cardiff's Christmas festivities.'"