Monica and Chandler's Engagement and Wedding Planning: Monica and Chandler get engaged, and the season focuses on the hilarious and often stressful process of planning their wedding.

Rachel's Romantic Feelings for Joey: Rachel develops romantic feelings for Joey, which creates an uncomfortable situation given their close friendship and Joey's past with other members of the group.

Ross and Mona: Ross starts a relationship with Mona, a woman he meets at Monica and Chandler's wedding.

Phoebe's Relationship with Mike: Phoebe meets Mike Hannigan (played by Paul Rudd), and they begin a sweet and developing relationship.

Joey's Auditions and Career: Joey continues to pursue his acting career, facing the usual challenges and occasional small successes.