Fans are pretty excited that the cast and crew of the 'Pretty Little Liars', the teen drama mystery-thriller series on ABC Family, has commenced filming the rest of Season 5. In fact, even the 24-year-old starlet Ashley Benson, who plays Hanna Marin, also appears to be quite excited to return to work.

Ashley is so thrilled that she even posted a photo over Instagram captioned "Girls" and showed her co-stars Shay Mitchell, Lucy Hale and Troian Bellisaria on the set prior to the filming of a Season 5 episode.

From the picture, it seems that the girls are back at school and possibly in the lunch room - giving a glimpse of the behind-the-scene activities of Season 5.

The photograph reveals that Hanna has a new hair style - she may have done away with the black streaks, but retained her edgy statement. In fact, Ashley herself appears more vibrant than ever before.

Fans are already wondering what they can expect from the 'Pretty Little Liars' when the show returns for the rest of Season 5 next January. There is enough reason to believe "A's" identity will be revealed before the end of the season.

This has not only been hinted by the 'Pretty Little Liars' executive producer Marlene King, but even cast members Troian Bellisario and Keegan Allen have said they know the masked psycho's identity. Therefore, it is assumed the unveiling of "A" will be a major plot point come Season 5.

In the meantime, ABC Family has already confirmed two more seasons of the series. This also means there's going to be many more mysteries to come.

Many fans are of the view that the producers of the show cannot drag "A's" identity in the shadows for another two season. Therefore, fans can expect to find out who the notorious character actually is.

Fans should look forwards to the 'Pretty Little Liars' Halloween fan special on Tuesday, Oct. 21, at 8 pm ET on ABC Family.