Maggie Macfadyen
According to People, Matthew and Hawes welcomed their first child together — a daughter named Maggie — in December 2004, a month after they got married. The couple made their first public appearance with Maggie at the London premiere of "Noddy and The Island Adventure" in October 2005. Hawes's first son, Myles McCallum (whom she shares with ex-husband Spencer McCallum), also tagged along for the event. Since then, Maggie has kept away from the spotlight and doesn't appear to have any social media accounts, either.
In October 2021, Matthew briefly mentioned his daughter while speaking with the Evening Standard. The actor said that while he gets a lot of attention for his role in "Succession," his children aren't that interested in it. "They haven't seen it," he said about his kids. "My daughter, who's 16 is like, 'Can't you just be in a good show, like 'The Vampire Diaries?'"
Clearly, it seems Maggie is just like any other teenager who obsesses over vampire shows.