After standing in as best man for his longtime friend Carl Petersen, Randy Dupree loses his job, becomes a barfly and attaches himself to the newlywed couple almost permanently -- as their houseguest. But the longer Dupree camps out on their couch, the closer he gets to Carl's bride, Molly, leaving the frustrated groom wondering when his pal will be moving out.

During her wedding ceremony, Rachel notices Luce in the audience and feels instantly drawn to her. The two women become close friends, and when Rachel learns that Luce is a lesbian, she realizes that despite her happy marriage to Heck, she is falling for Luce. As she questions her sexual orientation, Rachel must decide between her stable relationship with Heck and her exhilarating new romance with Luce.

A newlywed couple finds their lake-country honeymoon descend into chaos after Paul finds Bea wandering and disoriented in the middle of the night.

A best man (Wilson) stays on as a houseguest with the newlyweds, much to the couple's annoyance.