Molly Ringwald sings the show's theme song "Let's Do It, Let's Fall In Love" written by Cole Porter.
During the beginning of filming, Shailene Woodley had to wear a back brace to correct her scoliosis.
The series is made by the same producers as 7th Heaven. When Amy is soon to be in labor she asks for a Dairy Shack burger which is the same fast food restaurant in 7th Heaven that Matt Camden was once a delivery boy for.
Shailene Woodley (Amy Jurgens) And John Schneider (Marshall Bowman) played father and daughter in the 2005 movie, Felicity: An American Girl Adventure based on the American girl doll.
Cierra Ramirez and Marlene Forte also played grandmother and granddaughter in The Fosters.
Jennifer Coolidge (Betty) was the stepmother in A Cinderella story and Megan Park played the step sister in A Cinderella story: once upon a song.
Stills of Renee Olstead's character Madison Cooperstein in Secret Life prominently appear in her film Unfriended as her character's past facebook photos, visible on her timeline and only stills of her blonde hairdo of the show, utilized by the film's writer Nelson Greaves so as to suggest her character Jess Felton in Unfriended was a natural blonde.
Shailene Woodley has said it was difficult to go to work in the later seasons because she disagreed so strongly with the shows views and the direction it was headed. If not contractually required she would not have been doing the show towards the end
Madison Cooperstein's Renee Olstead would go on to star in the acclaimed teenage slasher horror film Unfriended which also features Courtney Halverson as main teen victim character Valerie Rommel, Halverson makes a single episode appearence in Secret Life in a very small role in a scene with Olstead and the two as their respective characters of Jess Felton and Val Rommel in Unfriended are against each other in argument, paralleling their shared scene in Secret Life.