The event will feature performances from artists including Katie Melua, Griff, Fisherman’s Friends, Hannah Waddingham, and Dan Smith from Bastille.
Prince William is scheduled to give a reading, with Prince George, Princess Charlotte, and Prince Louis also expected to attend.
The service will celebrate love, community spirit, and kindness, with readings by Hollywood stars Kate Winslet and Chiwetel Ejiofor.
The Westminster Abbey service will be broadcast on ITV1 and ITVX on Christmas Eve and repeated on Christmas Day, alongside 15 community carol services across the UK.