The family admits no one actually believed it would work out, so Pete and Ellie decide to officially adopt them. At Thanksgiving dinner with Ellie's family, Pete and Ellie say they have decided not to adopt. The Wagners' meeting with Lizzie and her siblings does not result in an immediate connection, making them reconsider. Karen and Sharon reveal that Lizzie has two siblings, 10-year-old Juan and 6-year-old Lita, and their mother is a drug addict, in prison if they want Lizzie, they must take Juan and Lita too. At a fair to meet foster children, Ellie voices her reluctance to foster/adopt a teen, when they are confronted by 15-year-old Lizzie, who impresses them. They enroll in foster care, led by social workers Karen and Sharon. Husband and wife Pete and Ellie Wagner, derided by relatives who think they will never have children, consider adoption. It grossed over $120 million worldwide, and was called an 'earnest, heartwarming comedy' by critics, who also praised the performances.

Instant Family was released in the United States on November 16, 2018. Also starring Margo Martindale, Julie Hagerty, Tig Notaro, and Octavia Spencer, the film is directed by Sean Anders, who wrote the screenplay with John Morris, based in part on Anders' own experiences. Instant Family is a 2018 American family comedy-drama film starring Mark Wahlberg and Rose Byrne as parents who adopt three siblings, played by Isabela Moner, Gustavo Quiroz, and Julianna Gamiz.

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