After the events of the movie/book, Mark Darcy is found out to be the father of Bridget's baby instead of Jack Qwant (or Daniel Cleaver, if you only read the book BJB). Bridget and Mark get married, going on to raise their son William "Billy".

Who is father of Bridget Jones Baby?

The story then jumps ahead in time to Mark and Bridget's wedding, with Jack as a guest holding onto baby William, and the movie finally reveals that Mark is the father.

Who does Bridget Jones end up with in Mad About the Boy?

Ultimately, things do not work out with Roxster because of the age difference. Bridget ends up dating Scott Wallaker, a military veteran-turned-teacher, who has two kids of his own.