Mamma Mia! centers on Sophie, who secretly invites three men from her mother Donna’s past to her wedding on a Greek island to learn which one is her father: Sam, Bill or Harry. Donna’s best friends, Tanya and Rosie, and Sophie’s fiancé, Sky, complete the main cast of this ABBA-powered comedy.
Built on songs by ABBA’s Benny Andersson and Björn Ulvaeus, with a book by Catherine Johnson, Mamma Mia! opened on Broadway at the Winter Garden Theatre in October 2001 and ran for more than 5,700 performances, closing in September 2015 (IBDB, Playbill). It came back to the same theater in August 2025 for a return engagement (IBDB, Playbill), and it has toured North America many times. It began in London’s West End in 1999. Here is who is who on the island of Kalokairi, and which songs belong to whom. For the full score, see our Mamma Mia! songs explained guide.
| Character | Who they are | Key song(s) |
|---|---|---|
| Donna Sheridan | Taverna owner, Sophie’s mother | “Mamma Mia,” “The Winner Takes It All” |
| Sophie Sheridan | The 20-year-old bride | “Honey, Honey,” “I Have a Dream” |
| Sam Carmichael | American architect, possible dad | “SOS,” “Knowing Me, Knowing You” |
| Bill Austin | Australian writer and adventurer, possible dad | “The Name of the Game,” “Take a Chance on Me” |
| Harry Bright | British banker, possible dad | “Our Last Summer” |
| Tanya | Thrice-divorced Dynamo | “Does Your Mother Know” |
| Rosie | Free-spirited Dynamo | “Chiquitita,” “Take a Chance on Me” |
| Sky | Sophie’s fiancé | “Lay All Your Love on Me” |
Who are Donna and Sophie Sheridan?
Donna Sheridan is the beating heart of the show: a former girl-group singer who now runs a taverna on a fictional Greek island, singlehandedly and on a shoestring, as “Money, Money, Money” makes clear. She raised her daughter alone and has made peace with not knowing who Sophie’s father is. Then three ex-boyfriends walk off the ferry on the eve of the wedding, and her composure collapses in the title song.
Donna gets the score’s biggest emotional moments. “One of Us” and “SOS” circle her unfinished feelings for Sam, “Slipping Through My Fingers” is a mother watching her child grow up too fast, and “The Winner Takes It All” is the show’s great eleven o’clock number, where she finally tells Sam how much he hurt her. By the end, she walks Sophie down the aisle herself and then, in a happy twist, marries Sam on the spot.
Sophie Sheridan is 20 and about to marry Sky. She wants her father to give her away, so she reads her mother’s old diary, finds three candidates, and invites all of them without telling Donna, which is the comic engine of the whole evening. She opens the show with “Honey, Honey,” dreams about her fathers fighting over her in “Under Attack,” and sings “I Have a Dream” as the curtain falls. Her arc is quietly radical for a wedding musical: she realizes she does not need to get married yet, and that the paternity question does not matter.
Who are Sam, Bill and Harry, the three possible dads?
All three men arrive believing they are guests at a wedding; each leaves as “one-third of a father.” On stage they are:
- Sam Carmichael, an American architect. He was Donna’s great love, and it turns out he broke off his own engagement and returned for her, only to find she had moved on. He tries to give Sophie fatherly advice in “Knowing Me, Knowing You” and fights with Donna in “SOS,” before finally proposing to her in the joyful wedding-day finale.
- Bill Austin, an Australian writer and adventurer, and a proud bachelor. A family connection convinces Sophie, and him, that he must be her father, and he shares “The Name of the Game” with her. Then Rosie corners him with “Take a Chance on Me,” and his single life looks less certain.
- Harry Bright, a British banker, once a carefree young man who shared a brief fling with Donna. He offers to pay for the wedding and reminisces with Donna in “Our Last Summer.” Near the end, he reveals that he is in a committed relationship with a man.
Together the three sing “Thank You for the Music” with Sophie in Act One. The show never settles which man is the father, and that is the point: the family Sophie wanted turns out to be bigger than the one she was looking for.
Who are Tanya and Rosie (the Dynamos)?
Before the taverna, Donna fronted a girl group called Donna and the Dynamos, and her old bandmates arrive for the wedding. Tanya is glamorous, wealthy and three times divorced, with a wit as dry as the island air. Rosie is unmarried, warm and gloriously unbothered by what anyone thinks of her. Together they are Mamma Mia!’s comic double act and Donna’s emotional support team.
The trio’s big moments come in Act One, when Tanya and Rosie comfort Donna with “Chiquitita” and coax her back to her younger self with “Dancing Queen.” At Sophie’s bachelorette party, they pull on their old costumes for “Super Trouper.” In Act Two, Tanya brushes off the young bartender Pepper in “Does Your Mother Know,” and Rosie takes her shot at Bill in “Take a Chance on Me.” For more on how these roles come together in rehearsal, read behind the scenes on Mamma Mia!.
Want to play these songs yourself? ABBA’s melodies, from “Dancing Queen” to “The Winner Takes It All,” are built on memorable chord patterns that make them great practice for pop piano. Try Pianoforall.
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Who is Sky, and who are Sophie’s friends?
Sky is Sophie’s fiancé, and he gets the swooning “Lay All Your Love on Me” before his friends drag him off to his bachelor party. When he discovers what Sophie has been plotting, he feels betrayed that she kept it from him. In the end, he agrees they are not ready to marry, and the two leave the island to see the world together.
Sophie’s best friends and bridesmaids, Ali and Lisa, join her for “Honey, Honey” as she gushes about the diary. On Sky’s side are Pepper, who works at Donna’s taverna and pursues Tanya, and Eddie. They are small roles, but they give the ensemble numbers their party energy.
How are the characters different in the movie?
The 2008 film, directed by Phyllida Lloyd, who also directed the stage show, keeps the story and most of the characters. The biggest change is Bill: on stage he is Bill Austin, an Australian, but in the film he is Bill Anderson, a Swedish sailor and travel writer. The film also gives Tanya and Rosie surnames, Chesham-Leigh and Mulligan, and adds Harry’s partner, Petros, as a character at the wedding.
The sequel, Mamma Mia! Here We Go Again (2018), is a film-only story that goes back to Donna’s youth and has no stage version. If you liked the musical’s song-packed fun, try our musicals like SIX list, or the comic chaos in Rock of Ages songs explained.
Frequently asked questions
Who is Sophie’s father in Mamma Mia!?
The show never says. Sophie invites Sam, Bill and Harry because any of them could be her father, and Donna admits she does not know either. By the end, all three men happily agree to be “one-third of a father,” and Sophie decides the answer does not matter to her anymore.
Who are the Dynamos in Mamma Mia!?
Donna and the Dynamos was the girl group Donna sang with when she was young, with her best friends Tanya and Rosie. Tanya and Rosie come to the island for Sophie’s wedding, and the three friends reunite for numbers such as “Dancing Queen” and “Super Trouper,” wearing their old costumes for the bachelorette party.
Who is the main character in Mamma Mia!?
Mamma Mia! has two leads: Sophie, whose wedding plan drives the plot, and her mother, Donna, who has the biggest songs and the deepest emotional arc. Sophie opens and closes the show, but Donna’s story, including “The Winner Takes It All,” is what most audiences remember on the way home.
What songs does Donna sing?
Donna sings or leads “Money, Money, Money,” “Mamma Mia,” “Chiquitita,” “Dancing Queen” and “Super Trouper” in Act One. In Act Two she sings “One of Us,” “SOS” with Sam, “Our Last Summer” with Harry, “Slipping Through My Fingers” with Sophie, and “The Winner Takes It All.”
Is Mamma Mia! the same on stage as the movie?
Mostly. The 2008 film follows the stage story closely, uses the same ABBA songs for most scenes, and was directed by the stage show’s director, Phyllida Lloyd. Some details change, such as Bill becoming a Swedish character named Bill Anderson. The 2018 sequel is a new, film-only story.
