The seventh and final season of the American mystery drama television series Pretty Little Liars, based on the books of the same name by Sara Shepard, was renewed on June 10, 2014, for two additional seasons, making the show Freeform's longest running original series.

Elliot's true motive is later revealed to Alison; she managed to use his phone to alert the girls to her location when he takes her out in his car one night.

Toby discovers this and gets the cops to release Alison who reveals that she was the red jacket blonde but only tried to comfort Charlotte.

Hanna and Spencer follow the trail of a private investigator he hired to find Mary and bump into Ted who reveals he has been hiding her as she is his college fling with whom he conceived Charles.

Aria is forced into playing and becomes A.D.'s new helper, destroying Emison's baby nursery and leaving an "A" message in Spencer's house, until the Liars catch her in the act and she defects.

One year later, Mary escapes from prison and Mona is released from Welby but rejoins the A-Team and is sent to kidnap Spencer, who comes face-to-face with A.D. – Alex Drake, her twin sister.

She became A.D. to use the Liars to find Charlotte's killer and killed Wren as he always saw her as Alex while she wanted to become Spencer to have her "perfect life".

Mona moves to Paris and the "cop" is revealed to be her boyfriend who has imprisoned Alex and Mary in her basement dollhouse.

Hanna breaks off her engagement with Jordan, and later signs a contract with Lucas to construct a fashion company.

The investigation leads the Liars to question Elliott's murder altogether, with Hanna being conflicted about whether or not to tell the police the truth.

Emily questions the fact that Sara and Jenna have teamed up together, and finds out that Charlotte enlisted Jenna's help to find her birth mother and make Archer the alias of Elliott Rollins in order to purposely meet Ali and take advantage of her good intentions for her eventual release.

Meanwhile, Noel Kahn's behaviour starts to worry the girls when they find out he broke into Toby's house to steal Mary's Radley file.

Emily is appointed coach of the varsity swimming team and Paige is made an athletics supervisor at Rosewood High.

After some arguing, Ezra finally agrees to leave Nicole behind for Aria, while Emily encourages Ali to not get an abortion and raise her child.

Spencer steals a flash drive from Marco's apartment about Lucas' alibi confession to the police the night Archer was killed.

In Hanna's turn at the game, "A.D." makes her pick up something at the computer repair shop and bring it to Rosewood High School.

When Hanna, Caleb and Spencer take Mona back to their car, the final two puzzle pieces are waiting.

The seventh season was ordered with the sixth season on June 10, 2014, right before the fifth-season premiere aired, which made the show as ABC Family's longest running original series, surpassing The Secret Life of the American Teenager, which was ABC Family's previous longest running original series.

[37] On August 29, 2016, I. Marlene King with the principal cast of the show announced that Pretty Little Liars would end after the seventh season.

King also announced that the show would start airing the second half of the season later than usual, in April 2017 and that the series finale would be a two-hour episode event.

[4] It was reported on October 26, 2016, that a tell-all special will air after the series finale "Till Death Do Us Part", where the main cast and showrunner I. Marlene King talked about the show and behind-the-scenes exclusive also the writing assistant bc_emperor has confirmed that.

"[38][39] Showrunner I. Marlene King commented on these rumors to TVLine as she said "We have enough story to take us to the end of Season 7, and we’re going to let the fans tell us if they’re ready to say goodbye to this world and these characters.

"[46] It was announced on August 29, 2016, the day before the mid-season finale would air, that Pretty Little Liars will end after the seventh season.

[4] Production began on February 1, 2016, when King announced on Twitter that the writers were in full swing brainstorming and mapping the seventh season.

Lucy Hale continued her role as Aria Montgomery as she is set in a love triangle with Ezra and her boyfriend Liam.

Andrea Parker was added as a series regular, playing Jessica DiLaurentis' twin sister Mary Drake.

[51] Deadline reported on May 10, 2016, that actor Nicholas Gonzalez was cast as Detective Vic Furey, a character who will oversee the Rosewood Police Department.

[53] Tammin Sursok announced that she will return to the show as Jenna Marshall after last appearing in the fifth-season episode "How the 'A' Stole Christmas".

[56] The actress playing Sydney Driscoll, Chloe Bridges, posted an image on social media, confirming that she would return to the show after last appearing in the Christmas special episode.

[59] On August 17, 2016, TVLine reported that Edward Kerr would be returning to the show as Pastor Ted Wilson in the second half of the season.