The re-make of the 1960s movie The Haunting was made at nearby Harlaxton Manor...it's only a few miles away from Grantham. The original movie was much better than the re-make. Scenes from the 1995 movie, Pride and Prejudice, were shot at Belton Manor in Grantham - it's becoming a mini-Hollywood there...not really.
Also, I remember seeing a movie called Bad News Tour - it starred some of the guys from The Young Ones and The Comic Strip Presents. The movie was about a bad heavy metal band and their poor excuse of a tour (similar to Spinal Tap)...anyway...if I remember correctly, Grantham was one of the stops on their tour.
Two famous figures in England's past and present came from Grantham: Sir Isaac Newton and Margaret Thatcher. Thatcher was born (1925,) reared, and educated in Grantham and later became Prime Minister of England. The picture shows the childhood of home of Margaret Thatcher.
Newton made several great strides in the area of science. He was born in 1642 in the nearby town of Woolsthorpe and educated at the King's School which is found in Grantham on Brook Street (http://kingsgrantham.8m.com/index.html). He later developed many of his theories at Woolsthorpe. A statue of Newton stands in downtown Grantham. Exhibits on both Thatcher and Newton can be found at the Grantham Museum.
It's said that gingerbread or a type of gingerbread or the gingerbread man was created in Grantham (I've heard all three stories.) It was first made by accident in Grantham in the 1740s when a baker was making biscuits and added the wrong ingredient...the new concoction was a white cake he called Grantham gingerbread, and, from what I've read, it was a vast improvement to the biscuits that he was really trying to make. Anyway...even though the original recipe has changed, Grantham gingerbread is a local delicacy and can be sampled at Catlin's Restaurant.