The series was ordered by Netflix on April 25, 2024, as a 16-episode multi-cam sitcom that was initially untitled, created by Leanne Morgan, Chuck Lorre, and Susan McMartin.

The show remained untitled until May 28, 2025, when it was officially given the title Leanne, shortly before its premiere.

Leanne Morgan was already attached to star as the lead when the series order was first announced in April 2024.

Kristen Johnston, who plays Leanne's sister Carol, joined the cast as a series regular on May 9, 2024.

Nick Bakay joined the production later on as an additional executive producer alongside Judi Marmel, Chuck Lorre, Susan McMartin, and Leanne Morgan.

On Rotten Tomatoes, the series holds a 71% approval rating based on 21 critic reviews, with critics praising Leanne Morgan's likability and the show's comforting, classic-sitcom feel.

Metacritic gave the series a weighted average score of 62 out of 100 based on 12 critics, indicating 'generally favorable' reviews.

The series was renewed for a second season in September 2025, just over a month after its July 31, 2025 premiere, with the new season set to debut on August 27, 2026 with 10 episodes.