Kate Middleton Baby Bump, Wears Polka Dot Topshop Dress On Tour Of Harry Potter Films

Pregnant Kate Middleton showed off her baby bump in a short $58 dress by TopShop, sporting black suede heels and a black Ralph Lauren jacket during her visit with Prince William and Harry at the Harry Potter film on Friday.

The royal couple, who is attending the inauguration of the Warner Bros. Studios in Leavesden, Herfordshire, was scheduled for a visit to the Great Hall, a presentation on Diagon Alley which will include special effects, and wand lessons in The Gryffindor Common Room, the Daily Mail reported.

See photos HERE.

The three then checked out props and costumes from the Batman film, The Dark Knight.

Afterwards, they headed over to a "green screen" where draftsman Ed Symon sat on a different model of the Batpod motorbike that was sitting on top of a "six axis motion base," according to the report. It was originally built for the broomstick flying in the Potter movies.

Special Effects Supevisor John Richardson, who worked with these films said that Middleton was enthusiastic about how the movies continue to attract all ages. "She was saying how the films were very much loved by the younger generations as well," he said

At the end of their visit, the couple will host a meeting for their Charities Forum in the Great Hall, which featured as the original set from the Harry Potter film series.

The Charities Forum is a collection of charities, and Middleton, Prince William and Prince Harry are Patrons of the organization.