Okay, if you don't forgive me, I never talk to you again.
Sophia to Callie in Over Under
Sophia Quinn
General Information
Gender: Female
Age: 20
Hair Color: Dark Brown
Eye Color: Brown
Birthday: July 15, 1999
Family & Friends
Family: Robert Quinn Sr. (paternal grandfather)
Robert Quinn (father)
Jill Quinn (mother)
Callie Adams Foster (paternal half-sister)
Jude Adams Foster (cross-brother)
Personal Information
Vulnerabilities: Being alone and sad
Production Information
First appearance: Things Unknown
Last appearance: Collateral Damage
Portrayer: Bailee Madison

Sophia Quinn is the daughter of Robert and Jill Quinn, the paternal younger half-sister of Callie Adams Foster and suffers from a personality disorder. She first appeared in Things Unknown.

Sophia is the half-sister of Callie Jacob through that of their shared birth father Robert Quinn. She likes horse-riding, has an interest in fashion and thinks her dog is the most adorable thing ever. She is very excitable and bubbly, but in Over Under it is revealed that she has suicidal thoughts.

After getting to know Callie, she immediately grew attached to her and told her father how she wished they could adopt her. She also wondered what it would be like if her father had stayed with Callie's mother, Colleen Jacob, when Callie comments that Sophia might not exist, Sophia suggests that it might not be such a bad thing. In later episodes her true suicidal feelings are brought to light, she is diagnosed with a personality disorder and entered into professional help and begins making positive progress.

Sophia is portrayed by Bailee Madison.

Physical Appearance

Sophia has white skin, brown hair, and brown eyes. Sophia has a striking resemblance to her half-sister Callie, however, there are slight differences between the two in terms of fashion and style. For example, Callie dresses very casually and comfortably whereas Sophia's style is much more high maintenance and girly. She wears a lot of bright colored clothing (consisting of pinks, yellows, and purples).


Sophia has demonstrated suicidal tendencies along with desperately craving Callie's approval shortly after learning of her existence and personally meeting her. This is displayed in Over Under when she responded to Callie's refusal to forgive her for sabotaging her adoption process by the Fosters by walking straight into traffic - almost getting hit by a car and causing it to crash into another to avoid hitting her. In Someone's Little Sister, she appeared to attempt to drown herself when Callie called her "a spoiled brat".

Callie soon admits to Sophia's parents that the car crash she caused was not an accident, to which Sophia admits her suicidal thoughts, much to her parents devastation. In Light of Day, she is mentioned to be in a mental health facility and is believed by the doctors to have a depression disorder. She soon returns in the Season 2 finale, where she admits to feeling good again, but has insecurities regarding her mental disorder.


Things Unknown
She appeared for the first time in Things Unknown when her dad buys a milkshake for the both of them.

Take Me Out
She writes Callie a letter excited to learn that Callie is her sister and she wants to meet Callie.

Say Something
Sophia meets Callie for the first time, she seems very excited and asks Callie a lot of questions, she then takes Callie up to her room and tells her what she likes to ride horses, she learns that Callie has a boyfriend, they then make plans to go shopping.

Truth Be Told
Sophia comes to visit Callie to drop off and give her a jacket that is just like hers. She seems really excited to see Callie again.

The Longest Day
Callie and Jude join the Quinns, including Sophia, on their boat, where they spend a day sailing.

Someone's Little Sister
Sophia and her family agree to host a fundraiser for Girls United at their home. Sophia objects when her parents and Callie decide to only mention Callie as a 'friend', and asks if Callie can spend the night at their house the night before the fundraiser. The Quinns agree, and the night before the party, the girls bond, talking, and even sharing Sophia's bed. After Callie gives a speech revealing that Robert is her father and Sophia is her sister, Sophia pulls her aside, telling her that she has taken Callie's abandonment papers out of the mail, and has destroyed them, telling her that it's not too late for them to be a family. Callie becomes angry, calling Sophia an 'spoiled brat', and runs out. Sophia, visibly upset, locks herself in the bathroom.

Over Under
Sophia attempts to drown herself in the bathroom. When the her parents try to get custody of Callie, she goes with them to the judge and seems hurt when Callie says she doesn't want to see her. Later Sophia goes to Callie's work to apologize, but Callie says 'there is nothing she could say to make her forgive her'. Sophia responds saying that if Callie doesn't forgive her, she'd kill herself, but Callie thinks Sophia is being melodramatic. Sophia walks into the traffic and almost gets hit by car. When Sophia's parents come she tells them she walked in the traffic by accident, but Callie tells them Sophia tried to kill herself. Sophia then admits to her parents that 'sometimes she just wants to die' and that 'she doesn't think she can do this anymore'.

The End of the Beginning

Father's Day

Callie catches up with Sophia when they spend the afternoon together. Callie later gets a call and she takes Sophia to see the "bat signal" AJ and Ty have. Afterwards, Sophia spends the day with her family and Callie when they all go have lunch on the yacht.

It's My Party

Sophia attends Callie's birthday party and is mad and humiliated at Robert for what happened between him and Jill. During the party, she helps Brandon discover the truth about AJ by suggesting that they check his phone to see if he's called his brother. When the party was just about ending, Callie encourages Robert to go and talk to Sophia and apologize to her.

Many Roads

Robert mentions that Sophia had gotten Callie a present for her graduation.

Appearances (11/101)

Season 2 (8/21)

Season 3 (2/20)

Season 4 (1/20)


  • Sophia is the second daughter of Robert Quinn via his second marriage to Jill Quinn
  • She likes riding horses and was given a horse by her grandfather, but she decides to donate him to a charity where children are taught to ride horses due to no longer riding him like she used to when she was younger.
  • Sophia was born on July 15th, which was confirmed in the season finale in season 2.
  • In the show, Sophia and Callie have an almost exact resemblance, a detail that is often mentioned by various characters, due to being sisters. In real life, actresses Bailee Madison (Sophia Quinn) and Maia Mitchell (Callie Jacob) are not related and their similar appearances are possibly a result of good casting. 
  • Sophia has mentioned that she has a nanny.



v - e - d
Main Stef Adams FosterLena Adams FosterBrandon FosterCallie Adams FosterMariana Adams FosterJude Adams FosterJesus Adams FosterMike Foster
Recurring Adam StevensAdriana GutierrezAidenAJ HensdaleAna GutierrezBeckaCarmenColeConnor StevensCortney StrathmoreDani KirklandDaphne KeeneDean BayfieldDeclan RiversEmmaGabriel DuncroftGraceHayley HeinzJack DowneyJenna PaulJill QuinnKelseyKiaraLexi RiveraLogan BayfieldLou ChanMat TanMonte PorterMr. TimothyNickNoahPoppy SinfuegoRafaelRita HendricksRobert QuinnSophia QuinnTalya BanksTaylorTess BayfieldTonyVico CerarWyattXimena SinfuegoZac Rogers
Minor Main Article: List of Minor Characters
Amanda RogersCaptain RobertsChase DillonDana AdamsDariaDevoneeDonald JacobErnesto RiveraEvanFrank CooperGabiJoe GrayKarina SánchezKatKyle SnowLiam OlmsteadNathan AdamsOliviaSarahSharon ElkinSonya Rivera