Diaz played the supporting role of Kimberly, an upbeat, sweet, and affluent heiress, in the 1997 rom-com "My Best Friend's Wedding." Kimberly (nicknamed "Kimmy") is the new fiancée of leading lady Julianne's (Julia Roberts) best friend, Michael (Dermot Mulroney). Julianne sets out to stop the wedding when she realises she's in love with him. The film received positive reviews, with The Guardian calling it "simple but effective" and "cheesy but hilarious."