She's also over 45 now, as much as she doesn't look it. Most actresses can't get a role past 30, so it's pretty normal that she wouldn't be getting leading roles at this stage in her career. Also she had a kid and ended a marriage over the last few years, so she's been doing some real life stuff that kept her out of movies. Looking at IMDB she's still playing lead once or twice a year the past few years. I wouldn't say her star has fallen, as much as her career has evolved. And I doubt she's desperate for a supporting X-role.