The second book to "The Mortal Instruments" franchise by author Cassandra Clare is said to begin filming this 2014. Star and heroine in the movie, Clary Fray, which is played by Lily Collins had mentioned to MTV.com that none of the cast members are entirely sure when filming on "the Mortal Instruments: City of Ashes" will begin.

How would former Disney actor Zac Efron react when his so-called girlfriend, Lily Collins, would be rekindling her onscreen relationship with Jamie Campbell Bower?

Jamie Campbell Bower who plays the role of Jace Wayland in the movie adaptation of Cassandra Clare's epic books is also set to reprise his role as a shadowhunter and as Clary Fray's love interest. If you haven't read the other books after "City of Bones" then you would realize that it gets steamier in each book.

Zac Efron and Lily Collins are said to be a couple, the thing is would he be okay with Collins reuniting with Bower as these two used to be a couple as well before the premiere of "The Mortal Instruments: City of Bones"?

The two met on the set of the filming and finally became a real life couple but before fans could become excited they had decided to call it quits and be good friends. They had been seen promoting the film together despite having ended their romance.

Fans would be delighted to see the two back together may it be on the widescreen but their chemistry is evident and would this mean that they might rekindle their romance?

Uh-oh, Zac Efron it's time to be wary as filming for the second book, "The Mortal Instruments: City of Ashes" begins this year.