Caroline in the City

• Caroline Duffy (Lea Thompson) – Caroline is a cartoonist of the comic strip Caroline in the City. Originally from Peshtigo, Wisconsin, Caroline has a need for people to like her. She meddles in the lives of her friends and people around her, and often gets into trouble because of it. She initially breaks her engagement to Del Cassidy, but remains friends with him. She hires Richard Karinsky to be her colorist. Although Richard has feelings for Caroline, she does not realize or reciprocate until the end of the second season. She dates veterinarian Joe DeStefano in the second season, and former classmates Trevor and Randy in the third and fourth seasons. She becomes engaged to Randy, but her wedding ceremony is interrupted when Richard appears.
• Richard Karinsky (Malcolm Gets) – Richard is the colorist for the Caroline in the City comic strip. He is a struggling artist who usually lives in the slummy parts of New York City, and is regularly embarrassed about the nature of his job. He has several chances for a big break, but they end up in failure. He is also an excellent pianist. He has a substantial student loan debt from attending an unnamed art school. He has a sarcastic personality, especially with Annie. He falls in love with Caroline during the first season, and does not think highly of Del Cassidy and his lack of intelligence. Eventually he and Caroline have a relationship.
• Del Cassidy (Eric Lutes) – Del works at a greeting card company owned by his father, and manages the Caroline in the City comic strip card products. He is Caroline's sometimes boyfriend; they get engaged during the first season, but break it off in the season finale.[2] After receiving one too many insults from his callous father, Del quits to build his own business, Eagle Greeting Cards. In the fourth season, he sells the business to a large entertainment conglomerate.
• Annie Spadaro (Amy Pietz) – Annie is Caroline's across the hall neighbor and her best friend. She is a dancer in the Broadway production of Cats.[3] She is somewhat promiscuous and this makes her a constant target for Richard's wisecracks. After Richard writes Caroline a love letter which he later regrets, Annie comes across the letter and uses it to blackmail him until her sister uses it for a song. After meeting Shadoe Stevens in Los Angeles, she quits her job and rushes to California to shoot a television pilot. Unfortunately, the pilot is not picked up, and she becomes unemployed.
• Charlie (Andy Lauer) – He is a delivery boy in Del's father's company, and after Del is fired, they become partners in new company Eagle Greeting Cards. He constantly wears roller blades, even when he is not making deliveries. He has a poor grasp on reality. In the last season, he moves to Europe.

• Remo (Tom La Grua) – Remo owns the Italian restaurant, Remo's Ristorante, where the main characters usually hang out.
• Gianni (John Mariano) – A waiter at Remo's Ristorante.
• Joe DeStefano (Mark Feuerstein) – A veterinarian who dated Caroline, and came close to moving into her apartment. However, after he tells Caroline that he slept with his ex-girlfriend, he and Caroline split.
• Julia Mazzone Karinsky (Sofia Milos) – Richard's former girlfriend and love of Richard's life (as he calls it 'sincero amore' – the love that one does not have to question). She first met Richard in Italy, and during the third season, they get married. Her father, an Italian businessman, does not approve of their relationship and tries to destroy Richard, first physically, then economically.
• Trevor (Robert Gant) – Trevor is Caroline's boyfriend during the third season. He owns a computer company and has a German shepherd dog. When Caroline rushes to Spain to meet Richard and Julia, Trevor realizes that he will never win a place in Caroline's heart.
• Randy (Anthony Tyler Quinn) – Randy is a pediatrician and schoolmate of Caroline from Peshtigo, Wisconsin. He initially reunites with Caroline during the fourth season; he buys Caroline's parents' house, but agrees to sell it to Caroline and rent it from her. When he arrives in New York for the pediatricians seminar they meet again, and Caroline realizes that she harbors some feelings for him, even though she is in a relationship with Richard. After Richard goes to Italy to take care of his son, Annie brings Randy to cheer Caroline up, and he falls in love with Caroline. They have a wedding in the final episode.
• Angie Spadaro (Candice Azzara) – Annie's mother who regularly visits Annie's flat and drives her crazy. She gets divorced in the third season.
• Pete Spadaro (Adam Ferrara) – Annie's brother who worked at their father's undertaking company. He is influenced by Richard to try some other occupations including an electrician and a painter.
• Shelly (Lauren Graham) – Richard's short-term girlfriend. Richard was desperate to break up with her, but she always had a reason not to.
• Elevator Lady (Cathy Ladman) – Caroline's neighbor from one of the upper floors. She often appears in key dialogues when someone enters the elevator.

This is a list of the notable guest stars in the series. Some of them appear as their characters from related NBC series that aired around the same time.