On January 13, 2014, Disney Channel renewed "Liv and Maddie" for a 13-episode second season. The second season was later expanded to 24 episodes. The first season ended on July 27, 2014. The season season premiered on September 21, 2014. On April 3, 2015, the show was renewed for a third season by Disney Channel. The second season ended on August 23, 2015. The third season premiered on September 13, 2015. On December 21, 2015, Dove Cameron stated that Disney Channel was picking up "Liv and Maddie" for a fourth season. On June 19, 2016, series co-creator Ron Hart announced on Twitter that the fourth season would premiere in fall 2016. On July 1, 2016, Dove Cameron stated that they had filmed the series' final episode. On August 19, 2016, it was announced by the show's creators, John D. Beck and Ron Hart, that the last season would be called "Liv and Maddie: Cali Style". The third season ended on June 19, 2016. The fourth season premiered on September 23, 2016. The show ended on March 24, 2017.
Casting took place during the spring of 2012; however, only a pilot episode was made. Instead of hiring a new cast, production chose to keep those whom they had already hired and make a completely new pilot. The story now focused on Dove Cameron playing dual roles with the same parents and brothers. Lead billing for Cozi Zuehlsdorff was later dropped to guest star. The family name of "Rooney" was picked because of Sullenger's enjoyment of the Pittsburgh Steelers, a team owned by the Rooney family.
A full version of the "Liv and Maddie" theme song, "Better in Stereo", was recorded by Dove Cameron. It was released as a promotional single by Walt Disney Records on October 15, 2013. A music video was made. The music video aired on Disney Channel on the night of October 29, 2013. The song was featured twice in the show. The first time was in the last episode of season three, "Californi-A-Rooney". The second time was an acoustic version sung by Cameron. This was at the very end of the last episode of the show, "End-A-Rooney".
In the pilot episode, "Twin-A-Rooney", Liv shows Maddie a clip from the "Sing It Loud!" finale. In it, Liv's character, Stephanie Einstein, sings a cover of On Top of the World by Imagine Dragons. A full version of the song was recorded by Cameron. It was released as a promotional single by Walt Disney Records on August 27, 2013.
In "Fa-La-La-A-Rooney", Liv performs the classic "Let It Snow! Let It Snow! Let It Snow!" during the Steven's Point Holiday Spectacular. A full version of the song was recorded by Cameron. It was included on Holidays Unwrapped, a holiday album released by Walt Disney Records on October 15, 2013.
In "Song-A-Rooney", Liv performs "FroyoYOLO". It goes viral, but Liv hates it. In the same episode, Liv performs "Count Me In". A full version of "Count Me In" was recorded by Cameron. It was released as a promotional single by Walt Disney Records on June 3, 2014.
In "New Year's Eve-A-Rooney", Liv performs "You, Me and the Beat". A full version of the song was recorded by Cameron. It was released as a promotional single by Walt Disney Records on December 2, 2014.
In "Rate-A-Rooney", Liv uploads "What a Girl Is". Two versions were created, The first was the one shown in the show. The other, which included Christina Grimmie and Baby Kaely, was eventually recorded. Both versions are included in the "Liv and Maddie" soundtrack. The second version was released on iTunes on March 5, 2015. The original version was released on March 17, 2015. On March 17, 2015, the "Liv and Maddie" soundtrack was released. The soundtrack includes "Better in Stereo", "On Top of the World", "FroyoYOLO", "Count Me In", "You, Me and the Beat", and both versions of "What a Girl Is". The soundtrack also includes "Say Hey", "As Long As I Have You", and "True Love". There were two versions of "True Love": Ballad, which would be sung by Jordan Fisher, and a piano duet featuring Jordan Fisher and Dove Cameron. With the announcement of the soundtrack on March 5, 2015, the singles for those songs, except FroyoYOLO, were discontinued and are no longer available.
In "Prom-A-Rooney", Liv performs "True Love" at the school prom. Like she did with the other songs, Cameron recorded a full version of the song. It was released as part of the "Liv and Maddie" soundtrack on March 17, 2015.
In "Band-A-Rooney", Liv's band, "The Dream", performs "Say Hey" at the Battle of the Bands. A full version was recorded by Cameron. It had the band member's actor doing the chorus. The song was released as part of the "Liv and Maddie" soundtrack on March 17, 2015.
In "Video-A-Rooney", Liv's band performs "As Long As I Have You". Cameron recorded a full version. It was released as part of the "Liv and Maddie" soundtrack on March 17, 2015. The song was the last song from the soundtrack that was played in the show.
In "SPARF-A-Rooney", Andy Grammer performs "Honey, I'm Good". This is one of the few songs in "Liv and Maddie" that was not part of the soundtrack.
In "Sing It Louder!!-A-Rooney", Liv and Ruby perform "One Second Chance" on the set of "Sing It Louder!!" The song was recorded by Cameron and Lauren Lindsey Donzis. It was released as a promotional single by Walt Disney Records on November 4, 2016.
In "Falcon-A-Rooney", "The Power of Two" is performed again by Liv and Ruby for "Sing It Louder!!". Like the previous song in season four, Dove Cameron and Lauren Lindsey Donzis recorded a full version of the song. It was released on January 20, 2017.
In "Sing It Live!!-A-Rooney", Liv sings "My Destiny" for the special episode of "Sing It Louder!!". Again, a full version of the song was recorded by Cameron. It was released as a promotional single on March 3, 2017.
"Liv and Maddie" aired on Disney Channel in the United States and Family Channel in Canada. The pilot episode aired as a preview on July 19, 2013. It followed the premiere of the Disney Channel Original Movie "Teen Beach Movie". The first promo for the show was seen on June 28, 2013. It followed the premiere of "Disney's Mickey Mouse Shorts". The show officially premiered in the United States on September 15, 2013. It premiered in Canada on September 20, 2013. The show stopped airing in Canada on Family Channel on September 1, 2015. It started airing on Disney Channel on September 5, 2015. La Chaîne Disney in French Canada premiered the episode "Home Run-A-Rooney" on March 24, 2016. This was 17 days before the American and Canadian airing of the episode on April 10, 2016. In the UK and Ireland, the show aired as a preview on October 7, 2013. It later premiered on November 8, 2013. In Australia and New Zealand, the show premiered on October 11, 2013. The second season premiered on January 8, 2015. The third season premiered on December 2, 2015. The show premiered in Southeast Asia on January 10, 2014. In the Balkans, Greece, the Middle East, and Africa, the show premiered on March 8, 2014. The second season premiered on February 7, 2015. In India, the show premiered on October 30, 2017 on Disney International HD.
Emily Ashby of Common Sense Media gave the show's quality a rating of three out of five stars. She described it as a "jovial family sitcom". She said it can be watched by children ages seven and above. Ashby said that the show has a "comical spin" on common family issues like sibling rivalry. She said that it is a "worry-free pick for kids." Neil Genzlinger of "The New York Times" compared the show to "The Patty Duke Show". She described it as "a gentle, moderately amusing comedy". She also said that Cameron does a good job playing both main characters. She said that "the premise gives the writers plenty of opportunities."