sharon. there are plenty of royal secrets surrounding the wedding of britain's prince william and his fiance, kate middleton. but one question stands out, where will the ceremony take place. >> reporter: london's westminster abbey is the hot favorite to host the next year. after prince william's fiance, kate middleton, was seen walking out of the church wednesday night. >> almost certainly, that's where it is going to be. we're just waiting for the official announcement. >> reporter: in one way, it's the perfect fit. prince william's grandmother, the queen, was married there in 1947. so was her mother, william's great grandmother. but the london landmark holds painful memories for the prince. he was only 15, when he followed the coffin of his mother, princess diana, into westminster abbey, before her funeral in 1997. >> the historic church is right in the heart of central london, and just around the corner from buckingham palace. it also has enough room to fit 2,000 wedding guests. >> but it's got a rival across town. st. paul's cathedral is also in the running. and it, too, has bittersweet family ties. it'