Flanked by family and friends as well as rock royalty, Madonna and Guy Ritchie are set to say “I do” on Friday in Dornoch, Scotland, where hundreds of fans were camped outside the town’s 13th century cathedral, site of the ceremony. The house of worship has a police barrier around it, with the local constabulary vowing that anyone caught breaking down the barrier will spend Christmas in the lock-up. Paparazzi, meanwhile, descended upon the Highland town with their lenses pointed at such guests as Gwyneth Paltrow, Rupert Everett, Brad Pitt, Sting and Stella McCartney, who has reportedly designed the wedding gown. The post-wedding reception at Skibo Castle is expected to last into the wee dawn Saturday. In a warm-up to the Friday event, on Thursday, Madonna, 42, outfitted in an ankle-length cream coat with her hair pulled back in a bun, waved to the crowds outside the church as Ritchie, 32, carried their 4-month-old son Rocco inside for his christening. Madonna’s daughter Lourdes, 4, whose father is fitness trainer-turned-actor Carlos Leon, also attended that ceremony, which was presided over by the Rev. Susan Brown, who is also set to officiate at the wedding. The christening, however, was marred by three loud outbursts from an English protestor, say news reports. The intruder was arrested, and so far it is not known how he got inside.