Old Style or Modernised Old Style was the name given to a series of serif typefaces cut from the mid-nineteenth century and sold by the type foundry Miller & Richard, of Edinburgh in Scotland. It was a standard typeface in Britain for literary and prestigious printing in the second half of the nineteenth century and the early twentieth century, with many derivatives and copies released.

In typography, a serif is a small line or stroke regularly attached to the end of a larger stroke in a letter or symbol within a particular font or family of fonts. A typeface or "font family" making use of serifs is called a serif typeface, and a typeface that does not include them is sans-serif. Some typography sources refer to sans-serif typefaces as "grotesque" or "Gothic" and serif typefaces as "roman".