The series originally focused on Lauren Conrad, who appeared in its predecessor, as she pursued a career in the fashion industry. It additionally placed emphasis on her housemate Heidi Montag and their friends Audrina Patridge and Whitney Port. Conrad's friend Lo Bosworth and Montag's boyfriend Spencer Pratt developed major positions as part of the supporting cast in the second season, while his sister Stephanie Pratt was added in the third. Port left the series at the conclusion of the fourth season, moving to New York City and starring in her own spin-off, "The City", which aired for two seasons.