Answer
The two comedy films in which Heather Graham predominantly featured in 1999 are "Bowfinger" and "Austin Powers: The Spy Who Shagged Me." In "Bowfinger," Graham plays Daisy, a struggling actress caught up in a chaotic film production, while in "Austin Powers," she portrays Felicity Shagwell, the love interest of the titular spy. Both films showcase Graham's comedic talent and charismatic presence on screen.