When Curtis married British-American screenwriter Christopher Guest in 1984, he wasn’t yet a baron, according to Architectural Digest. But when his father died in 1996, he inherited his title. “I’m a baron. I’m Lord Haden-Guest. And yes, that’s a novelty. Born into it by accident, obviously. And then your dad dies and you’re the next one,” Guest told The Guardian in 2016.
At the same time, Curtis became Lady Hades-Guest. As indicated by his tongue-in-cheek tone, Guest doesn’t make much of his title — and Curtis is no different. In fact, she rarely addresses this aspect of her life. “It has nothing to do with me,” Curtis told Architectural Digest.
Source: The Real Reason Jamie Lee Curtis Doesn’t Use Her Royal Title