Matthew "Matt" Sullivan is Tia & Tamera's biological father.
Matt first met Racelle when the Detriot Free Press assigned him to do a photo essay on her murals in the 70s. They both instantly fell in love. They were living together within weeks of meeting each other. They planned to get married. However they got seperated when News Week asked Matt to do an assignment of a lifetime in Tel Aviv. Racelle was commissioned to paint a mural in Florida. She stated they would meet up again later, but omitted the fact that she was pregnant. They wrote every day for a while and when the letters stopped Matt discovered what had happened. Racelle died of complications during childbirth.
There seemed to be an instant connection with Tia and Matt. They both enjoyed photography and the stories behind the picture. Tia has his Nelson Mandela picture in her room and she expresses herself as a fan. When she found out Matt was her father, she instantly accepted it and was fine with everything. She was open and welcoming.
Once Tamera found out Matt was her father, she instantly doubted it. First because he was white, then because of the little amount of evidence. After she spoke with Ray, she realized she was afraid Matt would break up her family. Ray assured her that the family will just get bigger and suggested to invite him over for dinner. She still seemed hesitant at first, but then had a nice moment showing her scrapbook to her natural father.
Matt's photo journalist career has always been very important to him. After the death of Racelle it is implied that it was hard to have a family because its hard to settle roots in his career. He referred to his pictures as his children instead. Not much is known about his job, however it does seem to be dangerous. He has dodged a bomb, met Fidel Castro and held a camera steady in the wake of a tornado. This also came with benefits, he got to meet one of his heroes, Nelson Mandela and win a Pulitzer. Before even knowing Matt was her father Tia stated," He is one of the photojournalists in the world." It was mentioned that he worked with the Detroit Free Press and News Weekly.
- He took a picture of Nelson Mandela in prison and Fidel Castro lighting a match.
- It is implied he doesn't have a family aside from Tia and Tamera.
- He searched for all twins adopted at the time but didn't realize they were adopted separately
- He found Tia and Tamera when visiting University of Michigan for a photo exhibition.
- Prior to Father's Day, Tia and Tamera had thought both their parents had passed away. As stated in You Are So Beautiful.