The number above isn't a lie - there were over 110,000 people in attendance at the last London Comic Con. This convention used to be a single day but due to high turnout has now been stretched to three entire days. Walk the rows and see all the memorabilia and exhibits from your favorite comics, movies, television shows, and everything else this multi-genre show can put out.
You'll come for the cosplay and people-watching, but you will stay to see some random stars of film and tv. The last couple of expos had Thomas Jane, Julian Glover, Dylan Bruce, Meghan Ory, and the Fonz himself Henry Winkler. There's also the MCM Fringe Festival, which is everything you can find outside of the convention halls, including contests, games, and meet-ups.
Click here to view the official site of the MCM London Comic Con. It's considered the United Kingdom's #1 Popular Culture Show. While there will be autograph sessions with celebrities, a tip is to simply walk the floor. Many famous people come to town as guests and you'd be surprised who is there just as a fan.