My Best Friend's Wedding (1997)

Julianne Potter made a pact to marry her best friend Michael by 28 if love eluded them. Now, he's engaged to someone else. Realizing too late, Julianne, with her witty sidekick George, heads to Chicago, determined to thwart the 'wedding of the year.' 'My Best Friend's Wedding' stars Academy Award winner Julia Roberts, along with Dermot Mulroney, Cameron Diaz, Rubert Everett and Philip Bosco.